Pre-bowl report card: Grading Michigan's defensive position groups and special teams

No. 2 Michigan Wolverines football is 12-1, Big Ten champions and set to face No. 3 Georgia in the Orange Bowl, with a national title game berth hanging in the balance. We graded the Maize and Blue's offensive position groups, and now it's time to do the same for the defense and special teams after the Big Ten season has concluded. We also revisit our midseason report card as a comparison.