NHL referee Steve Kozari was stretchered off the ice Saturday after colliding with Tampa Bay Lightning defenseman Haydn Fleury during a game at PPG Paints Arena in Pittsburgh.
Fleury left for the locker room after the collision and did not return to the game.
Penguins and Lightning players cleared the benches to send Kozari off with stick taps.
Fleury and Kozari collided at center ice midway through the third period.
The ESPN on ABC broadcast reported that Kozari momentarily lost consciousness. He was reportedly able to move his extremities while being attended to by medical personnel.