03/02/2011 12:33 pm ET Updated Dec 06, 2017

Tommy Nunez Jr., NBA Referee, Injured After Colliding With Tony Allen In Spurs-Grizzlies Game (VIDEO)

One of the referees had to take himself out of the Spurs-Grizzlies game on Tuesday night after injuring his leg in the first quarter.

As Memphis' Tony Allen sprinted down the court on a fast break, he didn't realize how close he was to officoal Tommy Nunez Jr. Just before he caught the ball on a long pass, Allen appeared to accidentally trip Nunez and the referee fell to the floor.

Nunez laid on the ground by the Spurs bench for a moment as the San Antonio coaches tried to help him. He left the game at the next time out. Scroll down to watch the video.