CHAPEL HILL — Beyond the usual fare of standard box scores, the analytics that measure advanced statistics put Javonte Williams of North Carolina at the head of an elite class, rating him as the most difficult running back to tackle in college football this season.

It’s an unofficial crown the quiet Williams wears modestly, belying the pad-cracking punch he administers, and a situation that has teammate Sam Howell always on the lookout, the Tar Heels quarterback seeking to take advantage of his unique perspective there at field level.