The NFL is an intense mental game. It is mind over matter. DRob proves that theory.
It is the same idea for a RB. If this person is able to overcome the rentention issue. He could be better than you think, because so much of his play will be instinct. Unlike other RB's who try to read the defense too much and get caught.
We are all born ignorant, but one must work hard to remain stupid. Ben Franklin