Corliss Mondari Williamson (born December 4, 1973) 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. He previously served as an assistant coach for the Phoenix Suns. 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.

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