UPDATE: The Celtics report that Walker is experiencing concussion-like symptoms. He was taken to a Denver area hospital for further evaluation.

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Boston Celtics star point guard Kemba Walker had to be carried off the court on a stretcher during Boston's game in Denver after colliding with teammate Semi Ojeyele.

Walker ran head first into Semi Ojeleye's chest. Walker's head was down. His head snapped back and he immediately fell to the floor and didn't move until the medical staff laid him onto the stretcher.