Jason Campbell has started 70 of the 71 games he has played in his NFL career. His role changed when he signed on with the Bears to serve as Jay Cutler's backup. "I've been through learning new offenses a couple times, so that part I've already adapted to," Campbell said. "I'm just trying to learn this new role, understanding that a lot of what you do is going to come from the classroom and mental reps more than physically getting reps." The absence of a capable backup quarterback buried the Bears last season after Cutler went down with a broken thumb.