The betting spreads for Week 13 are beginning to roll out, and Michigan has opened as a 2.5-point home underdog to Ohio State. Further, that line has already dropped to Michigan +2.
This is a big shift from last week when Ohio State was almost a touchdown favorite, but things have changed after Michigan covered the spread against Penn State and Ohio State was upset by the Spartans.
Update (12:15 p.m. ET): The line already has shifted to Michigan -1.5. The Wolverines now are the favorites. Wow. That's incredible when you consider that Ohio State was a 16-point favorite over Michigan in the summer.
Update (1:30 p.m. ET): It's now Michigan -3.