After the Buckeyes emerged with a 31-20 win in Ann Arbor, Meyer said Barrett got "hit" on the sideline with "a guy with a camera" just before the game began.
Dwayne Haskins replaced Barrett in the game, and later led a touchdown drive.
Cardale Jones then stepped at quarterback and led Ohio State to the national championship.
MI took control of the game early, scoring two touchdowns in the first quarter.
On the next play after a false start on OSU, J.T. Barrett rushed for a 21-yard score to cut the deficit to 14-7.
He was tackled by Wolverines linebacker Mike McCray with 6:07 left in the quarter and his team trailing 20-14.
Increasing clouds tonight and Saturday, cooler weather Sunday
Warm and dry weather in the Omaha area is forecast to continue into the weekend and early next week, forecasters said. SUNDAY: Partly cloudy skies and chilly temperatures end up the weekend, with a high temperature of 50 degrees.
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Oklahoma City came away with the 108-91 victory, powered by Westbrook's 34 points, 10 rebounds and nine assists. After the game, Westbrook said the only friends he had on the court were his teammates and the basketball .
Barrett became the first Buckeye to start and win four games vs. MI. He also ran for 67 yards and a touchdown.
Meyer was unsure of Barrett's status heading into the Big Ten title game against Wisconsin next weekend.
Barrett was 3 for 8 for 30 passing yards and a touchdown before leaving with the injury. MI is just 1-13 vs. Ohio State in the last 14 meetings, and Jim Harbaugh has yet to defeat OSU since his arrival in Ann Arbor. The extra-point try was blocked.
The Buckeyes, who were held to minus 6 yards in the first quarter, answered with a 75-yard scoring drive.
Sean Nuernberger's 44-yard field goal, set up by a 29-yard pass from Haskins to K.J. Hill, made it 24-20 with 10:21 left.
MI began the drive at the OSU 5 after a 42-yard punt return from Donovan Peoples-Jones and a holding penalty on the Buckeyes. He apparently hurt himself before the game even started, however, according to Buckeyes coach Urban Meyer.