Corliss Mondari Williamson is an American basketball coach who serves as an assistant coach for the San Antonio Spurs of the National Basketball Association (NBA). He is also a former player who played for four teams during his 12-year career. In 2002, Williamson was selected as NBA Sixth Man of the Year. His nickname is "Big Nasty", a moniker he received from his AAU coach when he was 13. Williamson was a dominating power forward in college at Arkansas, but an undersized power forward in the NBA and mostly played at the small forward position.