Pistons forward Tayshaun Prince left the team's loss to the Celtics on Monday night after colliding with teammate Jason Maxiell.
He didn't return after appearing to take a knee in the back from Maxiell as the pair chased a rebound.
After laying on the court for a considerable amount of time, Prince was helped off the floor.
Prince has already missed a team-high 32 games due to injury this season.