You're concerned about the depth there? We might have more depth on the DL than any other position, save maybe LB. We only lose two guys after this year, bring in three, and get four more coming off of a redshirt. We will probably be three deep at all four spots next fall, without the incoming freshmen.
The nutty Michigan coverage isn't so much about Harbaugh as it is a signal to the Big Ten that Fox wants to party.