Michigan will be without defensive lineman Aubrey Solomon for the foreseeable future.

Solomon hinted that he had suffered a 'setback' on his private Instagram account, posting a cryptic message with a picture during the Wolverines' loss to Notre Dame last week. In the photo he posted on Instagram, Solomon is seen wearing a heavy brace on his knee.

"A minor setback for a major comeback," the private Instagram post read.

Solomon's mother, in a private Facebook post, brought attention to his injury saying that she was traveling to Ann Arbor to be with Solomon as he undergoes knee surgery. Solomon would take to his Snapchat account with a photo that said the surgery was a success.

Sources tell The Michigan Insider that the knee injury isn't expected to be a season-ending injury, but official word should be expected after the Wolverines take on Western Michigan on Saturday.

If there's one area, in particular, the Wolverines can afford to take a hit in depth, it would be the defensive line. Defensive line coach Greg Mattison met with the media recently to discuss his group's depth and being able to rotate players.

“This defensive line reminds me of the group we had two years ago — we may have eight starters,” Mattison said. “When you have a group of guys who have earned the right to play, I like to be able to say to them, 'You rotate yourselves. You look and watch that guy and if it’s going to be three plays, four plays, you decide, but we’re rotating throughout the game.’ ”

The Wolverines kick off against the Broncos at noon EST on FS1.