Defensive end Ryan Van Bergen said the hiring of defensive coordinator Greg Mattison was the best move Michigan made after ousting Rich Rodriguez.
In 2012, Michigan will have to replace some of its most reliable players due to graduation along the defensive line.
The Michigan linebackers are young and have struggled at times adusting to Greg Mattison's 4-3 after playing in a 3-3-5 the past three years.
The Michigan defensive line, while dramatically improved from a year ago, still has plenty of room for improvement.
The Michigan defense has been shaky against the ran but good against the pass and better at forcing turnovers.