Oklahoma Sooners quarterback Dillon Gabriel left Saturday's game against TCU after suffering an apparent head injury on a late hit.
Gabriel ran into a slide on a scramble early in the second quarter and was struck directly in the head by TCU linebacker Jamoi Hodge.
Gabriel's head bounced off the turf from the force of the hit. He lay motionless for a few moments after the collision, but was able to walk off the field under his own power.
Officials ejected Hodge from the game after the hit.
Moments after the collision, Hodge appeared distraught on the sidelines with a towel wrapped over his head before leaving for the locker room.
Following the hit against Gabriel, the Sooners scored on a 20 yard touchdown when running back Jovontae Barnes rushed for the long gainer.
But it was still a surprising 34-17 deficit for 18th ranked OU, which fell in an ugly 55-24 loss on the road that could drop it from the top 25 rankings.
In place of Gabriel, Oklahoma will turn to Davis Beville. In his career, Beville is 22 of 34 passing for 251 yards with a touchdown and an interception.
Update: Sooners coach Brent Venables said he wasn't able to update Gabriel's condition after the game, but that the quarterback was in concussion protocol, according to Tulsa World.