Wilton Speight was not at 100 percent in the fourth quarter on Saturday night.

The Michigan quarterback stayed in the game, but it was obvious that he was dealing with some serious pain in his left shoulder.

Ahead of this week’s showdown against Indiana, it’s unclear if Speight will be on the field. Jim Harbaugh addressed the health of his quarterback today.

For now, it looks like Speight will be a game-time decision:

Harbaugh didn’t go into detail about the severity of the injury, just that Speight would be evaluated later in the week.

As a result, Harbaugh said that John O’Korn and Shane Morris will get increased reps in practice. O’Korn came in as a highly-regarded transfer from Houston while Morris hasn’t started a game at quarterback since the Brady Hoke era.

Speight has started every game for the Wolverines this season. A week ago, Harbaugh said that he should be in the Heisman Trophy discussion after he dismantled Maryland. On the season, Speight has a 15:4 touchdown-to-interception ratio.

If Speight can’t go, Harbaugh said the Wolverines have plenty of confidence in O’Korn or Morris. The Wolverines would still be significant favorites against Indiana at home without Speight.

Harbaugh could obviously choose to play it safe with the Ohio State game less than two weeks away. The Wolverines don’t have any wiggle room after suffering their first loss of the year.

If recent history is any indication, don’t expect Harbaugh to determine¬†Speight’s official status until kickoff on Saturday afternoon.