If the opposing DL and LBs see the play developing and the RB is given the ball four yards deep with very little deception coming from other backs, OL, or the QB, then the D will slant and shoot gaps to quickly get to the point of attack. The result is a gain of a yard or maybe no gain. A quick hitting, no delay handoff preceeded by some motion like faking an end around and some convincing deception by Allar might help. And if just a yard is required, then give it to long, strong Dinkins vaulting over the top, like Warren (my invention).