Pass Pro from RBs is all about toughness. Takes guts to take on a 6’1 235 LB with a full head of steam. Miami RBs have historically been mentally and physically strong. Dalvin Cook is nice and all, but a prima donna like him don’t have the balls to take on blitzing LBs. IIRC, Portis wasn’t to good at pass pro either and we know he was a prima donna