In the NFL, it's all about versatility.
Supremely accurate passers inside the pocket are great; supremely accurate passers who can also scramble around, like Aaron Rodgers, are better.
Linebackers that rack up 10 sacks are Pro Bowlers; linebackers who rack up 10 sacks and can play the pass are coveted by every NFL team.
So, fullbacks who can open holes for the tailback are excellent. But those fullbacks who can also protect the quarterback in the passing game and pick up a few yards on the ground or as a receiver are top notch.
These are the 10 most versatile in NFL history, with the emphasis being on VERSATILE. In that case, several Hall of Famers and iconic fullbacks—those whose primary responsibility was to run the ball—aren't going to make this list.
It's hard to keep Jim Brown, Earl Campbell and Franco Harris off this list, but they weren't exactly complete fullbacks.