Diamon Simpson

On January 7, 2020, Simpson signed with Ironi Nahariya for the rest of the season, replacing Jeff Adrien.

On June 27, 2019, Simpson returned to the Alaska Aces for a third stint, signing for the 2019 PBA Commissioner's Cup.

On August 26, 2018, Simpson signed with the Russian team Avtodor Saratov for the 2018–19 season. However, on October 2, 2018, Saratov parted ways with Simpson due to a back injury before appearing in any game for them.

On December 22, 2018, Simpson returned to Israel for a fourth stint, signing with Maccabi Rishon LeZion for the rest of the season. On June 10, 2019, Simpson recorded season-highs of 28 point and 20 rebounds, shooting 12-of-17 from the field, leading Rishon LeZion to the Israeli League Final after a 92–86 win over Hapoel Jerusalem.

Diamon Simpson played for Team Gael Force in the 2018 edition of The Basketball Tournament. Team Gael Force made it to the Super 16 before falling to eventual tournament runner-up Eberlein Drive.

On March 1, 2017, Simpson signed a one-month contract with Maccabi Tel Aviv. On April 7, 2017, he was parted ways with Maccabi after appearing in six Euroleague games.

On March 1, 2016, Simpson signed with CB Estudiantes of the Spanish Liga ACB.

On April 13, 2012, Simpson signed with the Houston Rockets of the NBA for the remainder of the 2011–12 season. He was waived by the Rockets on September 7, 2012, without making an appearance for them.

Simpson signed for the Adelaide 36ers after original import John Williamson was ruled out with a knee injury. Simpson joined the 36ers for Round 3 of the 2011-12 NBL season. Throughout the season, he averaged 14.3 points, 8.6 rebounds and 1.5 blocks in 27 games. He also posted 12 double-doubles and had five 20-point performances with Adelaide and is widely considered to be easily the best performed of the imports for the 36ers during an era where the club claimed 3 wooden spoons in 4 seasons.

Simpson was bought out of his D-Fenders contract by the Alaska Aces of the Philippine Basketball Association (PBA) for the 2010 Fiesta Conference (despite a league rule that import players must be no taller than 198 cm). In his opening game for the Aces, he scored an impressive 36 points and grabbed 25 rebounds. By season's end, he was averaging around 25 points and 16 rebounds a game in a dominant display which made him a favorite of the Aces supporters. Despite not winning the Best Import award, he was able to lead the Aces in winning the championship over 18-time champions San Miguel Beermen which had returning import Gabe Freeman as well as Dondon Hontiveros and Arwind Santos for the locals.

After leaving the Aces Simpson signed with Turkish Basketball League team Türk Telekom for part of the 2010–11 Turkish season where he averaged just 7.3 points and 5.8 rebounds and 0.3 blocks per game in four games primarily playing at small forward.

After graduating from Saint Mary's Diamon Simpson started 2009 by attending the Golden State Warriors training camp but was unable to secure a spot on the Warriors roster. From there he signed to play for the Los Angeles D-Fenders of the NBA D-League in 2009–10 where he averaged 15.5 points, 9.6 rebounds and 1.4 blocks in his 30 games.

Born in Los Angeles County, California, Simpson grew up in the San Francisco Bay Area city of Hayward and graduated from Hayward High School in 2005.

Simpson attended the Saint Mary's College of California and played for the Saint Mary's Gaels in the NCAA's West Coast Conference (WCC) between 2005 and when he graduated in 2009. He was a teammate of Australian and Portland Trail Blazers backup point guard Patrick Mills when playing for the Gaels from 2007–2009.

Diamon Simpson (born September 8, 1987) is an American professional basketball player for Ironi Nahariya of the Israeli Premier League. He played college basketball for the Saint Mary's College before playing professionally in the NBA D League, the Philippines, Turkey, Australia, Israel, Spain, Czech Republic and Venezuela.