Ohio State quarterback Braxton Miller was hurt late in the third quarter of the seventh-ranked Buckeyes' victory over Purdue on Saturday.
Team spokesman Jerry Emig confirmed that the sophomore had been taken to the hospital and was being evaluated. He did not say what the nature of the injury was or its severity.
In his postgame remarks after Ohio State's 29-22 overtime win, coach Urban Meyer said he didn't know Miller's exact injury or his status.
"I think it's (his) head and that concerns all of us," he said.
Miller, mentioned among the top Heisman Trophy contenders, was at the end of a 37-yard run when he was thrown to the turf by cornerback Josh Johnson.
Miller didn't get up for several minutes — he was in obvious pain — while he was attended by several doctors and trainers. Eventually he sat up, then stood on shaky legs for at least 60 seconds before he was led to the sidelines. He was later taken to the locker room by cart.
Miller completed 9 of 20 passes for 113 yards with an interception and ran for 47 yards on 12 carries before leaving the game.
His replacement, Kenny Guiton, led Ohio State to a touchdown with 3 seconds left, then after that scoring pass also threw a two-point conversion pass to send the game into overtime.
In the overtime, Carlos Hyde scored on a 1-yard plunge for the Buckeyes before Purdue failed to complete any of its four passes.