Without a doubt the biggest change Gene Chizik has brought to Chapel Hill is the transition from the 3-3-5 sieve defense of the past few years to a more traditional 4-3 look. UNC's defensive line was a liability due to a lack of much pressure on the quarterback, which could be attributed to the scheme as much as anything. More important was the Tar Heels' weak performance against the run, giving up nearly 250 yards per game on the ground.
Chizik will try to stop the bleeding up front not only by changing up the alignment but by changing up position coaches.