For a 300 pound mountain of a man, Sheldon is VERY fast and athletic. This is a RARE combination of size and speed. There has to be a few short yardage formations that Sheldon would dominate.
He was a Rb, kick returner and forget what position on defense. His knickname is boss hog because he played almost everyone position. Hes a lot more athletic then he looks lol
The reason 3rd and 1 doesn't work for the Jets is that everyone in the universe (and if you believe in the multiverse, those universes too) knows where the ball is going. Not too difficult to stop a play if the defense is keyed to stopping it no matter how good the o-line is. I think it was John Madden who said that the QB sneak is the most difficult play to stop because it's only designed to gain 1 yard and you can't practice stopping it. We have an all-pro center and a QB that likes to stick his head in the mix. Beats the hell out of me why we keep handing it off to a RB.