The Ohio State quarterback exited the Buckeyes' game against rival MI on Saturday during the third quarter because of his knee. The fourth year QB injured his right knee.
O'Korn overthrew three open receivers in the first quarter, but he did connect with tight end Zach Gentry for a 27-yard gain on the Wolverines' first touchdown drive.
Returner K.J. Hill gained 11 yards on the run back of the second kick.
On first-and-goal from the MI one-yard line, Dobbins took the handoff from backup quarterback Dwayne Haskins and pushed the pile at the line of scrimmage into the end zone for his seventh rushing score of the season. At least the Buckeyes should feel good about Haskins after seeing the way he played on Saturday.
Next up for the Buckeyes is a Big 10 championship tilt with undefeated Wisconsin in a game that has major BCS title implications. Redshirt freshman Brandon Peters never cleared concussion protocol, and Wilton Speight was not cleared for contact, although he has been practicing with the team.
Ohio State rallied to win despite 14-point deficit for the first time in the 120-year history of "The Game", beating MI 31-20.
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Karan Higdon's 2-yard run gave MI (8-4, 5-4) a 20-14 lead midway through the third quarter.
O'Korn finished the game 17-for-32 for 195 yards, one touchdown and one interception. Three Michigan defenders had a bead on the ball, but it was Barrett who recovered.
The ensuing extra point game the Buckeyes a 21-20 advantage over MI. The extra point gave the Buckeyes a 21-20 lead.
The Buckeyes, who were held to minus 6 yards in the first quarter, answered with a 75-yard scoring drive.
The Buckeyes ran nine offensive plays in the first quarter for a total of minus-6 yards - the first time they have had negative yards in a quarter under head coach Urban Meyer.
Donovan Peoples-Jones returned a punt 42 yards during the closing seconds of the quarter.