Early in the third quarter of Wednesday's game, Portland big man - and star player - LaMarcus Aldridge drove into the lane, and in the process of making his shot, was undercut by Spurs center Aron Baynes.
Aldridge fell hard to the floor and landed dead on his tailbone, sending a jolt all the way up the 6"11 power forwards back and causing serious pain.
The 28-year old stayed on the ground for a long time and had to be helped off the court and into the locker room by teammates carrying him on either side.
Aldridge had surgery to repair a labral tear on his right hip at the end of the 2011-12 season, forcing him to miss the season’s final eight games and the Blazers will be hoping that he hasn't aggravated the old injury.
Aldridge had 14 points and four rebounds at the time of the injury, helping cut down the Spurs lead to just eight points with plenty of game time left. He leads Portland in scoring and rebounds rebounds this season with 23.6 points and 11.2 grabs respectively.
The All-Star underwent an x-ray which came back negative according to the Blazers official Twitter account, but the number 12 could still face a serious period on the sidelines.
Aldridge reportedly left the arena in a wheelchair.