Yori Boy Campas

His 2006 fight against Ireland's John Duddy was a candidate for the 2006 Fight of the Year.

During a press conference held at Phoenix, Arizona, on March 24, 2004, Campas announced he had moved to that city. Two days later, he returned to the ring after a ten-month layoff, defeating Dumont Dewey Welliver by a ten-round split decision. He followed his win over Welliver with an eight-round decision win over Raul Munoz, also in Phoenix. Campas then suffered a mild upset, when he was beaten by the relatively unknown Eric Regan by decision in twelve rounds, at Oroville, California.

After one more knockout win, he tried to gain the WBC & WBA light middleweight titles against Oscar De La Hoya, on May 3, 2003, again, in Las Vegas. He lost that fight by knockout in round seven.

After two wins in a row, he lost to Oba Carr. For his next fight, however, he became the first boxer to beat Tony Ayala, when Ayala was knocked out in round eight by Campas at San Antonio, Texas. On March 16 of 2002, he received his next world title shot, for the vacant WBO light middleweight title, against Puerto Rico's Daniel Santos, once again in Las Vegas. He lost by knockout in round eleven.

Campas then decided to campaign in the light middleweight division, beating Fidel Avendano by a knockout in round two in his first fight there. Campas had four straight wins before challenging for a world title again, this time against the IBF light middleweight champion Raul Marquez. On December 6, 1997, in Atlantic City, New Jersey, Campas became world champion by knocking out Marquez in round eight. He defended his title three times, beating Anthony Stephens by a knockout in three at Ledyard, Connecticut, Pedro Ortega by technical knockout in eleven at Tijuana, and former Trinidad opponent Larry Barnes by knockout in three in Las Vegas. On December 12 of 1998, however, he lost the title, after retiring in his corner in the seventh round against Fernando Vargas at Las Vegas.

Campas came back with seven straight wins, including one that gave him the WBO's regional NABO welterweight title, when he knocked out former world champion Genaro Leon in three rounds, August 7 of 1995. On September 6, 1996, he was given a second world title try, against José Luis Lopez, for the WBO welterweight title, in Los Angeles, California. Campas lost by knockout in round six.

Campas also beat former world champion Jorge Vaca by a knockout in round two at Tijuana, before receiving his first world title fight, September 17 of 1994 against Félix Trinidad for the IBF welterweight title, as part of a Pay Per View undercard that featured Julio César Chávez's rematch against Meldrick Taylor for the WBC light welterweight title. Campas, who had been considered by many Mexicans to be the next Chávez, dropped Trinidad in round two, but he lost, for his first professional defeat in 57 bouts.

Campas, whose brother Armando was also a respected professional fighter, began his professional career on July 7, 1987 at the age of fifteen, by knocking out Gaby Vega in the first round at Ciudad Obregón, Sonora. His first thirteen fights were all won by knockout, and he built a record of 56-0 with 50 knockout wins by the time the IBF had him ranked as their number one world title challenger. Prior to that, he had won the Mexican and regional NABF welterweight titles. He won the NABF one on his first fight abroad, defeating Roger Turner by a twelve-round decision in Las Vegas, Nevada, on June 19, 1992.

Luis Ramón "Yori Boy" Campas Medina (born August 6, 1971) is a Mexican professional boxer who held the IBF Junior Middleweight title from 1997 to 1998. A veteran of the sport since 1987, he continues to fight as of 2019.