Michigan coach Jim Harbaugh confirmed injured starting quarterback Wilton Speight has practiced this week.

Harbaugh, on his weekly appearance on the “Jamie and Stoney” show on 97.1 (WXYT-FM), said Wednesday morning that Speight practiced as did backup John O’Korn, who started last week’s game against Indiana. Speight suffered an undisclosed injury to his left (non-throwing) shoulder late in the game at Iowa and missed his first game of the season last Saturday.

He was asked if it’s fair to say it’s 50-50 who will start for the Wolverines when they face Ohio State on Saturday in the final regular-season game.

“It’s accurate. They both practiced,” Harbaugh said, confirming what receiver Amara Darboh told reporters Tuesday night after practice. “That was Tuesday. Today is a new day. It was a good day for us yesterday. Our ball club had a very good Tuesday practice, and we’ll look to come back today and practice well again.”

Harbaugh was asked if he knows at this moment who will start when No. 3 Michigan plays No. 2 Ohio State.

“I have not decided yet, no,” Harbaugh told the show. “And I’m not going to tell you.”

Speight was in uniform last week and made a few throws before the Indiana game although he did not take any snaps.