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Nicholas John "Nick" Collison (born October 26, 1980) is a former American professional basketball player who played his entire 15-year career for the Seattle SuperSonics/Oklahoma City Thunder of the NBA.
On May 10, 2018, Collison announced his retirement from professional basketball. On January 12, 2019, the Thunder announced that they would be retiring Collison's No. 4 jersey, becoming the first number retired by the Thunder.