The Rich Rodriguez era in Michigan was defined by an explosive offense and an inept defense that led to his dismissal.
In 2010, the Wolverines defense hit rock-bottom. They gave up 35 points a game and needless to say, they couldn't stop anybody from scoring on them. This led to many unnecessary losses.
When Brady Hoke was chosen to be the head coach of the Michigan Wolverines in January 2011, he hired his friend Greg Mattison. As many people know, Mattison was the defensive coordinator of the famed Baltimore Ravens defense.
With the combined efforts of Hoke and Mattison, the Wolverines defense once again became respectable, giving up just 17 points per game. Michigan's win/loss record reflected their much-improved defense, as they went 11-2 and won the Sugar Bowl.
But that was 2011. How will year two go in Greg Mattison's defense? How will Michigan replace some key departures on the defensive line?