Michael Phelps

All but two of the records were set in a long-course (50-meter) pool. As of July 26, 2019, he holds four world records (indicated in bold), not including his records for most Olympic medals and most Olympic gold medals ever won by one person.

Phelps began swimming at the age of seven, partly because of the influence of his sisters and partly to provide him with an outlet for his energy. After retirement in 2016, he stated "The only reason I ever got in the water was my mom wanted me to just learn how to swim. My sisters and myself fell in love with the sport, and we decided to swim." When Phelps was in the sixth grade, he was diagnosed with attention deficit hyperactivity disorder (ADHD). By the age of 10, he held a national record for his age group (in the 100-meter butterfly) and began to train at the North Baltimore Aquatic Club under coach Bob Bowman. More age group records followed, and as of August 21, 2018, Phelps still held 11 age group records, eight in long course, and three in short course

In January 2018, Phelps revealed that he has struggled both with ADHD and depression, having contemplated suicide after the 2012 Olympics.

In 2017, Phelps joined the board of Medibio, a company focused on diagnosis of mental health disorders.

After the 2008 Summer Olympics, Phelps started the Michael Phelps Foundation, which focuses on growing the sport of swimming and promoting healthier lifestyles. Phelps retired following the 2012 Olympics, but he made a comeback in April 2014. At the 2016 Summer Olympics in Rio de Janeiro, his fifth Olympics, he was selected by his team to be the flag bearer of the United States at the 2016 Summer Olympics Parade of Nations. He announced his second retirement on August 12, 2016, having won more medals than 161 countries. He is often considered the greatest swimmer of all time.

At the US trials in Omaha for the 2016 Summer Olympics, Phelps won the 200 m butterfly (1:54.84), the 200 m individual medley (1:55.91), and the 100 m butterfly (51.00 s) events. This made him the first American male swimmer, and the second American swimmer overall after Dara Torres, to qualify for a fifth Olympics. Phelps' 100 m freestyle time at the Trials were not impressive. However at a final training camp in Atlanta a week before heading to Rio, Phelps put out "the fourth-fastest flat-start time of the year" in a 100 free time trial, automatically securing one of the seven spots on the Men's 4 × 100 metre freestyle relay for the Olympics.

In his first event on August 7, the 4 × 100 m freestyle relay, he won his first gold medal of the 2016 Games and his 19th Olympic gold medal overall. Phelps swam the second leg with what his coach Bob Bowman described as "maybe the best turn that's ever been done", overtaking France's Fabien Gilot to give his American teammates a lead which they would not relinquish. Phelps's leg proved to be the decisive factor in the race, and Gilot later remarked "As fast as my teammates were, the extraterrestrial that is Phelps was faster". Phelps achieved a split time of 47.12, the fourth-fastest of the field (the three fastest times were posted by the team anchors), which was also faster than any of his relay splits at the last three Olympics.

Phelps is married to former Miss California USA Nicole Johnson. They secretly married on June 13, 2016, and the marriage was not publicly reported until four months later. They met in 2007 at the ESPYs, broke up in 2012, reconciled, and got engaged in February 2015. They have three sons, Boomer Robert Phelps, born on May 5, 2016, Beckett Richard Phelps, born on February 12, 2018, and Maverick Nicolas Phelps, born on September 9, 2019. The family lives in Paradise Valley, Arizona, an affluent town adjoined to Phoenix, where Phelps volunteers alongside Bowman as an assistant coach for the Arizona State Sun Devils swim team.

After having been dropped from the team for the 2015 World Aquatics Championships for a DUI, Phelps instead competed in the US National Championships (long course) in San Antonio as his target meet of the summer. He won gold medals in the 100-meter butterfly (50.45 s), 200-meter butterfly (1:52.94), and the 200-meter individual medley (1:54.75). In each of these events he swam the fastest time in the world for 2015.

In December 2015 at the Winter Nationals in Federal Way, Phelps won titles in the same three events, again in long course, bringing his career total to 62 national titles.

In April 2014, Phelps announced he would come out of retirement, and would enter an event later that month. In May 2014, he won the 100-meter butterfly event at the Arena Grand Prix in Charlotte, North Carolina. Phelps was reportedly motivated by the national team's failure to win the men's 4 × 100 m freestyle relay since their Beijing 2008 and Rome 2009 titles. The relationship between Phelps and coach Bob Bowman had deteriorated in the preparations for London 2012, so Phelps convinced a skeptical Bowman that he "wasn't training for history. He wasn't training for the medals. He wasn't even training for all the fans. This time Phelps wanted to swim for himself...and enjoy the journey". Since his returning from retirement in 2014, Phelps "scaled back his calorie intake" and "increased his postswim ice baths". By the 2016 Olympic Trials, despite his age Phelps "felt physically stronger in the water, perhaps because of drills Bowman added to his pool workouts, like multiple repeats of 40 seconds of dolphin kicking while hugging a 10-pound weight to his chest".

In September 2014, Phelps was arrested again, this time on charges of driving under the influence of alcohol and speeding in Baltimore, Maryland. As a result, USA Swimming suspended him from all competitions for six months, and stated he would not be chosen to represent the United States at the 2015 World Aquatics Championships in August. With Phelps off the team, the United States failed to qualify for the finals of the 4 × 100 m freestyle relay.

Phelps is the long course world record holder in the men's 400-meter individual medley as well as the former long course world record holder in the 200-meter freestyle, 100-meter butterfly, 200-meter butterfly, and 200-meter individual medley. He has won 82 medals in major international long course competitions, of which 65 were gold, 14 silver, and three bronze, spanning the Olympics, the World Championships, and the Pan Pacific Championships. Phelps's international titles and record-breaking performances have earned him the World Swimmer of the Year Award eight times and American Swimmer of the Year Award eleven times, as well as the FINA Swimmer of the Year Award in 2012 and 2016. Phelps earned Sports Illustrated magazine's Sportsman of the Year award due to his unprecedented Olympic success in the 2008 Games.

For the 2012 Summer Olympics in London, Phelps originally stated he would never do eight events again, and would instead try new events. Phelps said, "I keep saying I want to go down and start sprinting, but Bob [Bowman, Phelps's coach] really isn't so keen on that ... I don't think that's going to happen ... Over the next four years, I'd like to try some different events, maybe not do some of the events I did here." However, at the 2012 United States Olympic Trials, the qualifying meet for the 2012 Summer Olympics, Phelps qualified in the same eight events that he swam in Beijing in 2008. He later dropped the 200-meter freestyle from his program, as he stated he wanted to focus on the 4×100-meter freestyle relay. During the trials, Phelps finished first in the 200-meter freestyle, 100-meter butterfly, 200-meter butterfly, 200-meter individual medley, and second in the 400-meter individual medley. In making his fourth Olympic team, Phelps holds the record for men for the most Olympic appearances in swimming representing the United States.

On July 28, 2012, Phelps placed eighth in the morning prelims for the 400-meter individual medley. Phelps, the two-time defending Olympic champion, won his heat in 4 minutes, 13.33 seconds with a time that was well off his world record of 4:03.84 set four years ago in Beijing, when Phelps won a record eight gold medals. He out-touched László Cseh by 0.07 seconds in his heat to qualify last for the final, locking out Cseh. In his first finals of the Summer Olympics, Phelps placed fourth behind fellow American Ryan Lochte, Thiago Pereira of Brazil, and Kosuke Hagino of Japan in the 400-meter individual medley. It was the first time Phelps failed to medal in an Olympic event since 2000. The next night, in his second event of the Games, he got a silver as a member of the 4×100-meter free relay. Phelps swam the fastest leg of the US relay team and the second-fastest of anyone in the race.

On July 31, 2012, Phelps won a silver medal in the 200-meter butterfly behind South African Chad le Clos by 5/100ths of a second, and a gold medal in the 4×200-meter freestyle relay, thereby equaling and then surpassing Larisa Latynina to become the all-time record holder for most Olympic medals won. Latynina was present at the race and asked to be the presenter of Phelps's medal, but was told that Olympic rules would not allow it. She called Phelps deserving of the record.

On August 2, 2012, Phelps won his 16th Olympic gold medal when he edged out Ryan Lochte to win the 200-meter individual medley with a time of 1:54.27, and by that victory also became the first male swimmer to win the same event in three consecutive Olympics. Rebecca Soni and Phelps (twice) are the only swimmers to successfully defend an individual title from the 2008 Games. This win also marked Phelps's fifth Olympic title in the individual medley, breaking the record of four shared by Hungarian Tamás Darnyi and Ukrainian Yana Klochkova.

Phelps's final event was the 4×100-meter medley relay in which he went on to win his 18th career gold medal and his 22nd overall. By winning 4 gold and 2 silver medals, Phelps concluded the 2012 Olympics as the most successful swimmer of the meet for the third Olympics in a row. After his last event, the international swimming federation FINA honored Phelps with an award commemorating his standing as the most decorated Olympian ever.

After the 2012 Olympics, Phelps retired from swimming, stating: "I'm done. I'm finished. I'm retired. I'm done. No more," and that "I just wanted to be done with swimming and didn't want anything to do with the sport anymore."

The Foundation's largest event is its annual fundraiser, the Michael Phelps Foundation Golf Classic. Phelps stated he hoped to work with his Foundation more after retirement from competition following the 2012 Summer Olympics in London.

In his first event at the 2011 World Aquatics Championships in Shanghai, Phelps won bronze in the 4×100-meter freestyle relay with Garrett Weber-Gale, Jason Lezak, and Nathan Adrian. This was Phelps's first bronze in a World Aquatics Championships. Phelps swam the lead-off leg in 48.08, the second-best lead-off in the field behind James Magnussen's 47.49. In his second event, the 200-meter freestyle, Phelps won silver for the second consecutive time at a World Aquatics Championships. This time he finished second to Ryan Lochte in the event with a time of 1:44.79, compared to Lochte's time of 1:44.44. In his third final, the 200-meter butterfly, he won his first gold medal with a time of 1:53.34 to become the first swimmer to win five gold medals in one discipline at the World Aquatics Championships. In his fourth event, the 200-meter individual medley, Phelps again finished second to Lochte in a personal best of 1:54.16, which was 0.16 behind Lochte who swam a new world record. It was Phelps's 30th medal in the World Aquatics Championships. Shortly after completing the semi-finals of the 100-meter butterfly, Phelps competed in the 4×200-meter freestyle relay with Peter Vanderkaay, Ricky Berens, and Ryan Lochte. Phelps's team won the gold medal in a time of 7:02.67. Phelps swam the lead-off leg in 1:45.53, the third-best leg in the field. In the 100-meter butterfly, Phelps won his third consecutive title (also winning in 2007 and 2009) and second individual title of the meet with a time of 50.71. In his last event, the 4×100-meter medley relay, Phelps teamed with Nick Thoman, Mark Gangloff, and Nathan Adrian to win gold in a time of 3:32.06. Phelps's butterfly leg of 50.57 was by far the fastest butterfly leg in the field.

On August 11, Phelps won his 22nd gold medal in the 200 m individual medley. He beat Kosuke Hagino, the 400 m individual medley champion, by 1.95 seconds. This was Phelps's 4th consecutive gold medal in the event as well as his 4th in the Games. He became the first swimmer to win the same individual event four times, surpassing the previous record of three held by Dawn Fraser and Krisztina Egerszegi. He also became the third Olympian to win the same individual event four times, after athletes Al Oerter and Carl Lewis. With that 13th individual gold medal, Phelps broke a 2,168-year-old ancient Olympic record, set by Leonidas of Rhodes, who had held the most Olympic individual titles of all time, with twelve.

At the 2010 National Championships, Phelps competed in five individual events. In the 200-meter freestyle, Phelps won ahead of Ryan Lochte in a time of 1:45.61. About an hour later, Phelps returned to the pool to win the 200-meter butterfly. But Phelps was not happy with his performance and called it the "worst" 200-meter butterfly of his life. In the 100-meter butterfly, Phelps won his 50th national title in 50.65. After the race, Phelps said he was "fairly pleased" with the result. In the 200-meter individual medley, Phelps finished second to Lochte 1:55.94 to 1:54.84. It was the first time Lochte had beat Phelps in a major national meet. In the 200-meter backstroke, Phelps finished in 4th place in 1:56.98.

On the first day of competition at the 2010 Pan Pacific Swimming Championships, Phelps opted out swimming in the final of the 200-meter freestyle to focus on the 200-meter butterfly. In the 200-meter butterfly, Phelps led from start to finish, coming in first with a time of 1:54.11. Although it was much slower than his 1:51.51 time from the previous year, Phelps had not lost a 200-meter butterfly final since 2002. On day two of the competition, Phelps swam in the heats of the 400-meter individual medley and contributed in the 4×200-meter freestyle relay. In the heats of the 400-meter individual medley, Phelps failed to make the A final, with Lochte and Tyler Clary taking the top two American positions. Phelps did not swim in the B final of the 400-meter individual medley. In the 4×200-meter freestyle relay, Phelps, with Peter Vanderkaay, Ricky Berens, and Lochte, finished first ahead of Japan and Australia. On day three of the competition, Phelps competed in the 100-meter butterfly and contributed in the 4×100-meter freestyle relay. In the 100-meter butterfly, Phelps finished first in a time of 50.86, a championship record. In the 4×100-meter freestyle relay, Phelps, with Lochte, Jason Lezak, and Nathan Adrian, finished first ahead of Australia and South Africa. As the lead-off leg in the 4×100-meter freestyle relay, Phelps set the championship record in the 100-meter freestyle with a time of 48.13. In his final event, Phelps swam in the 4×100-meter medley relay with Aaron Peirsol, Mark Gangloff, and Adrian and finished first ahead of Japan and Australia.

In 2010, the Michael Phelps Foundation, the Michael Phelps Swim School and KidsHealth.org developed and nationally piloted the "im" program for Boys & Girls Club members. The im program teaches children the importance of being active and healthy, with a focus on the sport of swimming. It also promotes the value of planning and goal-setting. im is offered through the Boys & Girls Clubs of America and through Special Olympics International. The Foundation has since developed two other programs, Level Field Fund-Swimming and Caps-for-a-Cause.

At the 2009 National Championships, Phelps drastically shortened his program, swimming in only three individual events. In his first event, the 200-meter freestyle, Phelps won with a time of 1:44.23. In his second event, the 200-meter butterfly, Phelps easily won with a time of 1:52.76, 0.88 seconds ahead of the second-place finisher. In his third event, the 100-meter butterfly, Phelps won with a world-record time of 50.22.

At the 2009 World Aquatics Championships, Phelps won a total of 6 medals, 5 golds and 1 silver. In his first event, the 4×100-meter freestyle relay, Phelps swam the lead-off leg in 47.78, well off his 47.51 performance in Beijing, but the American team was able to edge out Russia and France for the gold. For his second race, the 200-meter freestyle, Phelps lost his first race in four years to Germany's Paul Biedermann. Phelps touched second in 1:43.22, but Biedermann smashed Phelps's record of 1:42.96 set in Beijing a year ago with a time of 1:42.00. Phelps took the silver graciously, but coach Bob Bowman threatened to withdraw Phelps from international competition because Bowman claimed Biedermann had an unfair advantage because he was wearing a full polyurethane swimsuit, specifically an Arena X-Glide. Bowman said, "It took me five years to get Michael from 1:46 to 1:42 and this guy has done it in 11 months. That's an amazing training performance. I'd like to know how to do that." Phelps rebounded from this loss and for his third race, the 200-meter butterfly, Phelps won the gold and broke his own world record of 1:52.03 with a time of 1:51.51. For his fourth race, the 4×200-meter freestyle relay, Phelps swam the lead-off leg in 1:44.49 as the team went on to win the gold medal and break the world record set the previous year. After his loss in the 200-meter freestyle, many thought Phelps was vulnerable coming into the final for the 100-meter butterfly. His closest competitor, Milorad Čavić, who wore an Arena X-Glide (the same suit Biedermann beat Phelps with), thought people were making excuses for Phelps because he was wearing an LZR Racer. Čavić even offered to buy Phelps a new suit. For his fifth race, the 100-meter butterfly, Phelps won the gold and became the first man to complete it in under 50 seconds, beating Čavić 49.82 to 49.95. The victory prompted a fierce celebration from Phelps. For his final event, the 4×100-meter medley relay, Phelps won his fifth gold medal. Phelps, along with teammates Aaron Peirsol, Eric Shanteau, and David Walters, set a new world record in the event with a time of 3 minutes, 27.28 seconds.

In February 2009, a photograph of Phelps using a bong went viral; this resulted in the loss of the Kellogg Company as a sponsor, as well as a three-month suspension by USA Swimming. Phelps admitted that the photo, which was taken at a party at the University of South Carolina, was authentic. He publicly apologized, saying his behavior was "inappropriate".

Phelps was a USA Olympic team member in 2000, 2004, 2008, 2012 and 2016, and holds the records for most Olympic gold medals (23), most such medals in individual events (13), and most such medals at a single games (8, in Beijing 2008). A street in his hometown of Baltimore was renamed The Michael Phelps Way in 2004. On April 9, 2009, Phelps was invited to appear before the Maryland House of Delegates and the Maryland Senate, to be honored for his Olympic accomplishments.

At the 2008 U.S. Olympic Team Trials, Phelps competed in six individual events. In his first event, the 400-meter individual medley, Phelps broke his own world record of 4:06.22 with a time of 4:05.25. In his second event, the 200-meter freestyle, Phelps won with a time of 1:44.10, ahead of Peter Vanderkaay's time 1:45.85. In his third event, the 100-meter freestyle, Phelps placed second in his heat with a time of 47.92, ensuring him a spot on the relay. In his fourth event, the 200-meter butterfly, Phelps won with a time of 1:52.20. In his fifth event, the 200-meter individual medley, Phelps broke his own world record of 1:54.98 with a time of 1:54.80. In his sixth and final event, the 100-meter butterfly, Phelps won with a time of 50.89. When asked about his chances of winning eight gold medals in Beijing, Phelps said, "I am going to prepare for that meet just like I do every other meet ... There is only so much I can do in a month and then I am going to prepare myself the best that I can."

Phelps swam the first leg of the 4×100-meter freestyle relay in a time of 47.51 seconds (an American record for the 100-meter freestyle), and won his second gold medal of the 2008 Olympics, as well as setting his second world record of the Olympics (3:08.24). Teammate Jason Lezak, after beginning the anchor leg more than half a body length behind Alain Bernard, managed to finish ahead of the favored French swimmer by eight hundredths of a second. The top five teams in the final finished ahead of the world record of 3:12.23 set the previous day by the American B team in a preliminary heat. Phelps remarked that Bernard's pre-race comments of "smashing the Americans" had "fired me up more than anything else." Le Nouvel Observateur noted "Phelps taking the time to applaud and console Bernard" and wrote that this sportsmanship was "proof that the person who swims in the wake of Mark Spitz is also a great gentleman."

Unlike all six of his previous events in the 2008 Games, Phelps did not set a new world record, leaving intact Ian Crocker's world-record time of 50.40 seconds, set in 2005.

During the 2008 Olympics, Phelps was questioned by the press as to whether perhaps his feats were "too good to be true", a reference to unsupported rumors that Phelps might be taking performance-enhancing drugs. In response, Phelps noted that he had signed up for Project Believe, a project by the United States Anti-Doping Agency in which U.S. Olympians can volunteer to be tested in excess of the World Anti-Doping Agency guidelines. During the Games, Phelps passed all nine tests that were administered to him.

As a teenager, Phelps idolized Australian swimmer Ian Thorpe and modeled his public image after Thorpe. Thorpe initially said that it would be highly unlikely for Phelps to win eight gold medals at the 2008 Summer Olympics in Beijing. Phelps used the remarks as motivation and taped the words to his locker during the Games. Thorpe was in the stands for the 4×100-meter medley relay, where Phelps was swimming for his eighth Olympic gold medal. When Phelps and his teammates captured the gold, Thorpe gave a congratulatory kiss to Phelps's mother, then gave a handshake and a hug to congratulate Phelps. Afterwards, Thorpe said "I'm really proud of him not just because he won eight golds. Rather, it's how much he has grown up and matured into a great human being. Never in my life have I been so happy to have been proved wrong."

After the 2008 Olympics, Phelps used his $1 million Speedo bonus to set up the Michael Phelps Foundation. His foundation focuses on growing the sport of swimming and promoting healthier lifestyles.

At the 2007 World Aquatics Championships, Phelps won seven gold medals, tying the record for a global long-course championship held by Mark Spitz since the 1972 Summer Olympics, and broke five world records. Phelps first gold medal came in the 4×100-meter freestyle. Phelps swam the lead-off leg in 48.42 seconds and Neil Walker, Cullen Jones and Jason Lezak each expanded the lead to win in a Championship record of 3:12.72, just missing the world record of 3:12.46 set the previous year. His lead-off time was faster than the winning time in the individual 100-meter freestyle final later in the meet. Phelps set his first world record in the Championships in the 200-meter freestyle, his second race. Phelps won the gold ahead of Pieter van den Hoogenband and broke Ian Thorpe's six-year-old world record with a time of 1:43.86. For his third race, the 200-meter butterfly, Phelps won the gold and bettered his own world record of 1:53.71 with a time of 1:52.09. For his fourth race, the 200-meter individual medley, Phelps set his third world record with a time of 1:54.98, bettering his own world-record time of 1:55.84 For his fifth race, the 4×200-meter freestyle relay, Phelps swam the lead-off leg in 1:45.36 as the American team of Ryan Lochte, Klete Keller, and Peter Vanderkaay went on to win the gold medal and beat the previous world record set by Australia in 2001 with a time 7:03.24. For his sixth race, the 100-meter butterfly, Phelps edged out Ian Crocker 50.77 to 50.82 to win his sixth gold medal. For his seventh event, the 400-meter individual medley, Phelps won the gold medal in a world-record time of 4:06.22, more than 3.5 seconds ahead of Ryan Lochte. By winning seven gold medals, Phelps broke the record of six set by Ian Thorpe at the 2001 World Championships. The 4×100-meter medley relay team received a disqualification for a false start during a changeover in the heats, ending Phelps's chance of eight gold medals.

Even though Phelps competed in the backstroke in international competition only once (at the 2006 Pan Pacific Championships), he was among the best backstroke swimmers in the world. This is illustrated by his personal best times set in 2007, four months after the World Championships. At the US Nationals in Indianapolis on August 1, 2007, Phelps swam a 1:54.65 in the 200-meter backstroke, which was the third fastest of all time in the event, 0.33 of a second off the world record of 1:54.32 held by Ryan Lochte. Two days later Phelps swam a time of 53.01 sec in the 100-meter backstroke, 0.03 of a second short of the world record of 52.98 held by Aaron Peirsol and the second-fastest performance of all time. In 2007 Phelps swam into the all-time top three performances in seven individual events, four of these being world records.

At the 2006 National Championships, Phelps won three events. In his first event, the 200-meter butterfly, Phelps won with a championship record of 1:54.32. In his second event, the 100-meter butterfly, Phelps just edged out Ian Crocker 51.51 (another championship record) to 51.73. In his third event, the 200-meter individual medley, Phelps won with a time of 1:56.50, just ahead of Ryan Lochte's time of 1:56.78.

At the 2006 Pan Pacific Swimming Championships in Victoria, British Columbia, Phelps won five gold medals and one silver. In his first event, the 200-meter butterfly, Phelps won in a world record time of 1:53.80, his first world record in two years. In his second event, the 400-meter individual medley, Phelps easily won with a time of 4:10.47, 3.38 seconds ahead of second-place finisher Robert Margalis. In his third event, the 4×200-meter freestyle relay, Phelps, along with Ryan Lochte, Peter Vanderkaay, and Klete Keller, won the gold medal with a time of 7:05.28. In his fourth event, the 200-meter backstroke, Phelps won the silver medal, finishing behind Aaron Peirsol 1:56.81 to 1:54.44 (a new world record). In his fifth event, the 4×100-meter freestyle relay, Phelps, along with Neil Walker, Cullen Jones, and Jason Lezak, won the gold medal with a world-record time 3:12.46. In his sixth event, the 200-meter individual medley, Phelps won with a world record time of 1:55.84, breaking his record of 1:55.94 set in 2003.

At the 2005 World Championship Trials, Phelps decided to drop his specialty events, the 400-meter individual medley and the 200-meter butterfly, and experiment with the 400-meter freestyle and the 100-meter freestyle. Phelps went on to win the 400-meter freestyle, the 200-meter freestyle, the 100-meter butterfly, the 100-meter freestyle, and the 200-meter individual medley at the Trials.

At the 2005 World Aquatics Championships, Phelps won a total of six medals, five golds and one silver. In the 400-meter freestyle, Phelps did not make it past the preliminary heats and finished 18th overall with a time of 3:50.53. Later that day, in the 4×100-meter freestyle relay, Phelps won his first gold in the Championships. Two days later, on July 26, Phelps won his second gold in the 200-meter freestyle with a new American record time of 1:45.20, finishing ahead of Grant Hackett. Two days later, on July 28, Phelps finished seventh in the 100-meter freestyle final. Later that day, Phelps won his third gold in the 200-meter individual medley. On July 29, Phelps, along with Ryan Lochte, Peter Vanderkaay and Klete Keller, won the gold in the 4×200-meter freestyle relay with a time of 7:06.58. This was the fourth gold medal for Phelps. On July 30, Phelps swam in his last individual event, the 100-meter butterfly. In the final, Phelps could not match the speed of Ian Crocker and had to settle for silver, finishing 51.65 to 50.40, a new world record for Crocker. On July 31, Phelps earned his final gold medal when the United States team won the 4×100-meter medley relay. Phelps did not swim in the finals but still earned a medal because he swam in the heats.

At the 2004 U.S. Olympic Team Trials, Phelps competed in six events; the 200- and 400-meter individual medley, the 100- and 200-meter butterfly, the 200-meter freestyle, and the 200-meter backstroke. In his first event, the 400-meter individual medley, Phelps easily won with a world record time of 4:08.41. Two days later, in the 200-meter freestyle, Phelps won with a time of 1:46.27, finishing sixth-tenths of a second ahead of Klete Keller. Phelps, however, was not pleased with the result and wanted to be in the 1:45s and was uncertain if he would swim the event in Athens. The following day, Phelps won in the 200-meter butterfly with a time of 1:54.31, three seconds ahead of second-place finisher Tom Malchow. After two days off, Phelps was back in the pool and finished second to Aaron Peirsol (who broke the world record) in the 200-meter backstroke. Less than half an hour later, Phelps won the 200-meter individual medley title ahead of Ryan Lochte by 2.70 seconds. The following day, Phelps finished second to Ian Crocker in the 100-meter butterfly. Crocker won in a time of 50.76, a world record and 0.39 seconds ahead of Phelps. When the Trials were over, Phelps became the first person to qualify in six individual events for a U.S. Olympic team. However, Phelps dropped the 200-meter backstroke to focus on the 200-meter freestyle because he wanted to race Ian Thorpe. Even though Phelps did not compete in the 100-meter freestyle at the Trials, he was still selected for the 4×100-meter freestyle relay. Gary Hall, Jr. thought this was unfair and said Phelps did not deserve a spot on the relay. Phelps argued his program was too crowded to compete in 100-meter freestyle and was at least among the top four swimmers because he had beaten the top-seeded Jason Lezak the last time he had swum against him.

The next day, Phelps participated in two finals. In his first event, the 200-meter butterfly, Phelps made it four gold medals and world records in four events by swimming the final in 1:52.03, defeating silver medalist László Cseh by almost seven-tenths of a second despite his goggles' having filled up with water and being unable to "see anything for the last 100 meters. This fourth gold medal was his tenth, and made him the all-time leader for most Olympic gold medals won by an individual in the modern Olympic era. Moreover, Phelps became the first swimmer, male or female, to win three Olympic butterfly titles, after his two titles in the Athens 2004 Olympics. He also became the first swimmer to successfully defend an Olympic butterfly title.

He repeated the achievement of winning the same event at three Olympics the following evening, winning the Olympic gold medal in the 100 m butterfly, his last individual event. After two very close victories in the 100 m butterfly at the 2004 and 2008 Olympics (by 0.04 and 0.01 sec, respectively), in this race Phelps beat Le Clos and Yevgeny Korotyshkin, who tied for silver, by 0.23 sec.

At age 19 in November 2004, Phelps was arrested for driving under the influence of alcohol in Salisbury, Maryland. He pleaded guilty to driving while impaired and was sentenced to serve 18 months of probation, fined $250, ordered to speak to high school students about drinking and driving, and to attend a Mothers Against Drunk Driving (MADD) meeting. When Phelps was later asked about the incident by Matt Lauer on the Today Show, he said that he had "let a lot of people in the country down."

At Nationals, Phelps won the 200-meter freestyle, 200-meter backstroke, and the 100-meter butterfly. He became the first American swimmer to win three different races in three different strokes at a national championship. At the 2003 Duel in the Pool, a meet that pits swimming stars from Australia and the United States, Phelps broke the world record in the 400-meter individual medley with a time of 4:10.73 and almost broke the world record in the 100-meter butterfly, just missing the record by 0.03 seconds. At a meet in Santa Clara County, California, Phelps broke the world record in the 200-meter individual medley with a time of 1:57.94. Phelps said he broke the 200-meter individual medley world record after Don Talbot said Phelps was unproven, using his words as motivation.

At the 2003 World Aquatics Championships, Phelps won four gold medals, two silver medals, and broke five world records. Phelps broke his first world record on July 22 in the semi-finals for the 200-meter butterfly. Phelps swam a 1:53.93 to break his own world record of 1:54.58 set in 2001 and became the first man to swim under 1:54.00. In the final of the 200-meter butterfly, on July 23, Phelps easily won the gold medal, but did not come close to his world record with a time of 1:54.35. Less than an hour later, Phelps swam the lead-off leg for the 4×200-meter freestyle relay. Phelps put up a solid time of 1:46.60 (an American record) but the Americans could not match the depth of the Australians and ultimately finished second 7:10.26 to 7:08.58. In the 200-meter individual medley, Phelps dominated. On July 24, in the semi-finals of the 200-meter individual medley, he broke his own world record with a time of 1:57.52. On July 25, in the final of the 200-meter individual medley, Phelps smashed his own record with a time of 1:56.04 to win the gold medal and finished almost 3 seconds ahead of Ian Thorpe. About an hour before the final of the 200-meter individual medley, Phelps swam in the semi-finals of the 100-meter butterfly. Phelps dominated again, finishing in the top seed position with a world record time of 51.47. However, in the final of the 100-meter butterfly, on July 26, Ian Crocker erased Phelps's world record with a time of 50.98, to become the first man under 51 seconds. Phelps swam a 51.10 (also under his former world record), but had to settle for silver. In the final of the 400-meter individual medley, on July 27, Phelps broke his own world record with a time of 4:09.09 to easily claim the gold medal. About half an hour later, Phelps earned his final gold medal when the United States team won the 4×100-meter medley relay. Phelps did not swim in the finals, but still earned a medal because he swam in the heats.

At Nationals, the selection meet for the 2002 Pan Pacific Swimming Championships, in Fort Lauderdale, Florida, Phelps set an American record in the 200-meter individual medley and was just off the world record in the 200-meter butterfly. In the 400-meter individual medley, Phelps bettered the world record held by Tom Dolan with a time of 4:11.09, just ahead of Erik Vendt, who finished second with a time of 4:11.27, also below the old world record. In the 200-meter freestyle, Phelps was barely beaten by Klete Keller and in the 100-meter butterfly, Phelps beat Ian Crocker.

At the 2002 Pan Pacific Swimming Championships in Yokohama, Japan, Phelps won three gold medals and two silvers. In his first event, the 400-meter individual medley, Phelps won gold ahead of Erik Vendt with a time of 4:12.48. In the 200-meter butterfly, Phelps lost to Tom Malchow, finishing behind him 1:55.41 to 1:55.21. Phelps said he lost because he did not take butterfly training seriously after he broke the world record. In the 200-meter individual medley, Phelps won with a time of 1:59.70. In the 4×200-meter freestyle relay, Phelps, along with Nate Dusing, Klete Keller, and Chad Carvin, won the silver medal with a time 7:11.81 finishing behind Australia. The U.S. 4×100-meter medley relay team consisted of Aaron Peirsol, Brendan Hansen, Phelps, and Ian Crocker. In the final for the medley relay, Phelps swam a 51.1 split, at the time the fastest split in history. The final time of 3:33.48 was a world record.

At the World Championship Trials for the 2001 World Aquatics Championships, on March 30, Phelps broke the world record in the 200-meter butterfly to become, at 15 years and 9 months, the youngest male ever to set a world record in swimming. Previously the youngest male had been Ian Thorpe, who captured the 400-meter freestyle world record at 16 years, 10 months. At the World Championships in Fukuoka, Japan, Phelps broke his own world record in the 200-meter butterfly while en route to become a world champion for the first time.

Phelps's 0.01-second finish ahead of Čavić prompted the Serbian delegation to file a protest. Subsequent analysis of the video by the FINA panel, which required analyzing frames shot 1/10,000th of a second apart, was used to officially confirm Phelps's victory, but the images were not immediately released to the press. The initial refusal by official timekeeper Omega to release underwater photos of the finish also raised questions due to Phelps's sponsorship relationship with Omega. Čavić later wrote in his blog, "People, this is the greatest moment of my life. If you ask me, it should be accepted and we should move on. I've accepted defeat, and there's nothing wrong with losing to the greatest swimmer there has ever been."

Phelps' rapid improvement culminated when he qualified for the 2000 Summer Olympics at the age of 15, as he became the youngest male (since Ralph Flanagan in 1932) to make a U.S. Olympic swim team in 68 years. While he did not win a medal, he did make the finals and finished fifth in the 200-meter butterfly.

In his second event on August 9, the 200-meter butterfly, he became the first swimmer in history to make five finals in the same event, after finishing 5th in 2000, 1st in 2004 and 2008, and 2nd in 2012. At Rio, he won the title that he had lost to Chad le Clos four years earlier in London, edging Masato Sakai by 0.04 s. Phelps stated that winning back this title had been the main goal during his comeback. The preliminary and final of that event was heavily hyped as a rematch between Phelps and Le Clos. The relationship between Le Clos and Phelps had been cordial back in 2012–13 but it deteriorated in 2014 when Phelps came back from retirement and suggested that the current butterfly times were slow. In the ready room prior to the preliminary race, Le Clos's shadow boxing while Phelps "glowered in a corner" spawned the Internet meme with the hashtag #PhelpsFace. Le Clos's Wikipedia biography was even vandalized after the event final. At age 31, the victory made Phelps not only the oldest male champion, but also the oldest individual champion in Olympic swimming history, beating the records set by Duke Kahanamoku in 1920, and Inge de Bruijn in 2004 respectively. Phelps also became the first swimmer to win individual gold medals 12 years apart. Both these records were broken by Anthony Ervin three days later.

Michael Fred Phelps II (born June 30, 1985) is an American former competitive swimmer and the most successful and most decorated Olympian of all time, with a total of 28 medals. Phelps also holds the all-time records for Olympic gold medals (23), Olympic gold medals in individual events (13), and Olympic medals in individual events (16). When he won eight gold medals at the 2008 Beijing Games, Phelps broke fellow American swimmer Mark Spitz's 1972 record of seven first-place finishes at any single Olympic Games. At the 2004 Summer Olympics in Athens, Phelps had already tied the record of eight medals of any color at a single Games by winning six gold and two bronze medals. At the 2012 Summer Olympics in London, Phelps won four gold and two silver medals, and at the 2016 Summer Olympics in Rio de Janeiro, he won five gold medals and one silver. This made him the most successful athlete of the Games for the fourth Olympics in a row.

Phelps has trained under Bob Bowman since he was 11 years old. Bowman swam for Florida State University from 1983 to 1985. Phelps has said Bowman reminded him of a drill sergeant because of his disciplined and regimented ways. However, Phelps has said, "Training with Bob is the smartest thing I've ever done ... I'm not going to swim for anyone else." After the 2004 Summer Olympics, Bowman was hired as the head coach for the University of Michigan after Jon Urbanchek retired. Phelps joined Bowman at Michigan to train and attended classes, but did not pursue a degree. Phelps served as a volunteer assistant coach at Michigan. After the 2008 Summer Olympics, Bowman returned to Baltimore as CEO at the North Baltimore Aquatic Club. Phelps also returned to Baltimore with Bowman. When Bowman was hired as the men's and women's swimming coach at Arizona State University in 2015, Phelps moved to Arizona to continue training under Bowman. There is a popular myth that Phelps ate 12,000 calories every day, but Phelps has stated it’s been exaggerated and that he didn’t eat so much even in his growing days.

In his first event, the 400-meter individual medley, Phelps won his first Olympic gold medal in the world record time of 4:08.26. The following day, Phelps, along with Ian Crocker, Neil Walker, and Jason Lezak, finished in third place in the 4×100-meter freestyle relay with a time of 3:14.62. Crocker's lead-off time of 50.05 was the worst among the field and was blamed on sickness. In the event many were calling The Race of the Century, the 200-meter freestyle that was held the following day, Phelps finished in third place behind Ian Thorpe and Pieter van den Hoogenband. Although this race ended the chance to match Spitz's record, Phelps had savored the challenge even though it was not his strongest event, saying "How can I be disappointed? I swam in a field with the two fastest freestylers of all time". In his fourth event, the 200-meter butterfly, held the following day, Phelps won a gold medal with a time of 1:54.04, breaking Tom Malchow's Olympic record. About an hour later, in the 4×200-meter freestyle relay, Phelps, along with Ryan Lochte, Peter Vanderkaay, and Klete Keller, finished in first place with a time of 7:07.33. Two days later, in the 200-meter individual medley, Phelps finished first with a time of 1:57.14, an Olympic record. In the 100-meter butterfly final, held the following day, Phelps defeated American teammate Ian Crocker (who held the world record in the event at the time) by just 0.04 seconds with a time of 51.25. Traditionally, the American who places highest in an individual event will be automatically given the corresponding leg in the 4×100-meter medley relay final. This gave Phelps an automatic entry into the medley relay, but he deferred and Crocker swam instead. Phelps's gesture gave Crocker a chance to make amends (for a mistake at the start of a previous race) as well, getting his final shot at a gold medal. The American medley team went on to win the event in world-record time, and, since Phelps had raced in a preliminary heat of the medley relay, he was also awarded a gold medal along with the team members who competed in the final. In winning six gold and two bronze medals, Phelps, still a teenager, had the second-best performance ever at a single Olympics, behind Mark Spitz's seven gold medals at the 1972 Summer Olympics. Also, he became the second male swimmer ever to win more than two individual titles at a single Games with four, tying Spitz's four from 1972.

Phelps's seventh gold medal of the Games tied Mark Spitz's record for gold medals won in a single Olympic Games, set in the 1972 Olympics. It was also his fifth individual gold medal in Beijing, tying the record for individual gold medals at a single Games originally set by Eric Heiden in the 1980 Winter Olympics and equaled by Vitaly Scherbo at the 1992 Summer Games. Said Phelps upon setting his seventh-straight Olympic record of the Games in as many events, "Dream as big as you can dream, and anything is possible ... I am sort of in a dream world. Sometimes I have to pinch myself to make sure it is real."

On August 17, Phelps won his eighth gold medal in the 4×100-meter medley relay, breaking Mark Spitz's record of seven gold medals won in a single Olympic Games, which had stood since 1972. Phelps, along with teammates Brendan Hansen, Aaron Peirsol, and Jason Lezak, set a new world record in the event with a time of 3 minutes and 29.34 seconds, 0.7 seconds ahead of second-place Australia and 1.34 seconds faster than the previous record set by the United States at the 2004 Olympic Games in Athens. When Phelps dived in to swim the 100-meter butterfly leg, the third leg of the 400-meter medley, the United States had been trailing Australia and Japan. Phelps completed his split in 50.1 seconds, the fastest butterfly split ever for the event, giving teammate Jason Lezak a more than half-second lead for the final leg, which he held onto to clinch the event in world record time. Said Phelps, upon completing the event that awarded him his eighth gold medal and eighth Olympic record in as many events, "Records are always made to be broken no matter what they are ... Anybody can do anything that they set their mind to."

Phelps was born in Baltimore, Maryland, and raised in the Rodgers Forge neighborhood of nearby Towson. He attended Rodgers Forge Elementary, Dumbarton Middle School, and Towson High School. Phelps is the youngest of three children. His mother, Deborah Sue "Debbie" Phelps (née Davisson), is a middle school principal. His father, Michael Fred Phelps, is a retired Maryland State Trooper who played football in high school and college and tried out for the Washington Redskins in the 1970s. Phelps is of English, German, Irish, Scottish, and Welsh descent. His parents divorced in 1994, when he was nine years old, and his father remarried in 2000. Phelps later revealed that the divorce had a severe negative impact on him and his siblings, and his relationship with his father was distant for a few years after the divorce. He graduated from Towson High School in 2003.

Also on August 9, Phelps won his 21st gold medal in the 4 × 200 m freestyle relay together with Conor Dwyer, Townley Haas, and Ryan Lochte. For Phelps and Lochte, this was their 4th consecutive gold medal in this event, an all-time record in swimming for any event.