Darren Collison announces retirement after 10-season NBA career
Thunder Will Retire Nick Collison's Jersey
Seeing Off a True Pro – Thunder Fan Favorite Nick Collison Retires
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Nick Collison, NBAsports Wiki
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Nick Collison of Oklahoma City Thunder retires from NBA
Thunder veteran Nick Collison retires from NBA after 15 seasons
Nick Collison of Oklahoma City Thunder retires from NBA