Those were the days.......when NFL RBs and HBs were interchangeable.........and never knowing which was going to carry the rock.
Before the NFL, Leach did carry the rock for an ave around 3.5 ypc. His longest run..........15 yds. But, like they say, it's hard to stop a train........and Leach is a train.
The reason he has not been given the ball in this offense is probably because, if you have watched him after a catch, for some reason he goes down commonly at the point of first good contact with the defender. But in a 1 or 2 yd line situation, it would seem to be a possibility. He would have to go through exercises that would prepare him to hang onto the ball fiercely while being mauled in a stackup or pile.
For anyone interested, here's an 2008 article about Leach with some facts that aren't usually brought up.
LINK