Boston Celtics point guard Kemba Walker was strapped to a backboard and stretchered from the court late in the second quarter of Friday night's game in Denver against the Nuggets.
Walker ran head-first into the abdomen area of teammate Semi Ojeleye and appeared to suffer a neck injury.
He grimaced in pain as he went down and play was stopped as medical personnel from both teams tended to the star guard who was on the floor for several minutes.
Walker's teammates gathered around as did Nuggets players, plainly concerned about Walker.