But Belichick, widely regarded as one of the greatest—if not the greatest—NFL coaches of all time, is already noticing differences between players at the college and pro level. And it goes beyond the obvious age and skill differences that one would assume exist between the levels of football.

Headlined by Bill Belichick at North Carolina, the ACC has three ex-NFL head coaches leading its football programs this fall.

North Carolina head coach Bill Belichick says he's coaching his college football team like he coached in the NFL. Asked at the ACC media day if he's trying to introduce NFL-level schemes and concepts to college football,