Ohio State scored 17 unanswered points in the final 17 minutes to beat Michigan, 31-20, Saturday at Michigan Stadium.
Ohio State had to push past MI without quarterback J.T. Barrett, who left in the third quarter with a right knee injury.
Saturday's loss was the Wolverines' sixth straight to the Buckeyes and 13 in the past 14 meetings.
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.
Barrett suffered an apparent right knee injury during the third quarter. With blockers clearing the initial path, Barrett hustled down the Ohio State sideline for the touchdown.
Barrett left the game in the third quarter, limping off the field.
O'Korn appeared to keep the drive alive on third down, scrambling to his left and stretching the ball out near the first down marker while running out of bounds, but he was marked a yard short.
Ohio State quarterback J.T. Barrett (16) is sacked by MI linebacker Mike McCray (9) during the first half of an NCAA college football game, Saturday, Nov. 25, 2017, in Ann Arbor, Mich.
At the time of his injury, Barrett was 3 of 8 for 30 yards with a touchdown passing and had run 15 times for 67 yards and another score. "And (Barrett) is so tough he went out there and played and obviously we didn't do very well".
Initially, Ohio State took possession of the ball on a punt with a modest return. Barrett's status moving forward will be something to watch as Ohio State gets ready for next week's game.
Donovan Peoples-Jones returned a punt 42 yards during the closing seconds of the quarter.
"The Game" will always be the game in college football, regardless of Ohio State's and Michigan's records.
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. The extra-point try was blocked.
Haskins came in and converted six of his first eight third-down attempts. MI rushed the ball 36 times for 100 yards. Three Michigan defenders had a bead on the ball, but it was Barrett who recovered.
Two plays later, Haskins called his own number, rushed around right end and gained 22 yards before being pushed out at the one-yard line.
On the Buckeyes' next drive, he drove the team 47 yards to set up a 44-yard field goal that extended the lead to 24-20. Haskins finished the day throwing for 94 yards on six completions, and his unwavering performance kept the Buckeyes' playoff hopes alive.