Notebook: Defense building depth 

February, 8, 2013
2/08/13
9:00
AM ET
As long as Greg Mattison is Michigan's defensive coordinator, he will expect perfection. He demands a lot out of his players because he knows what it takes to reach the NFL.

The 2013 class for Michigan is all about getting to the next level and bringing in players who can help Michigan get there.

Defensive line

Drive Through: Is Michigan Hurting the Big Ten?
In 2011 Michigan went 11- 2. Since then, they've posted a 15-11 record and concurrently, the Big Ten has seen its national perception suffer. Is Michigan to blame for the Big Ten's image problem?
VIDEO PLAYLIST video