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.

Eric Mac Lain details the Tar Heels' roster makeover in Bill Belichick's first season.

Carolina’s transfer class is ranked No. 9 nationally and No. 3 in the ACC, according to 247Sports.