im seeing emmit listed as 5'9" its not out of the realm of possibility to think that maybe he was 2" shorter around 17 or 18 barry sanders at 5'8"
I don't think 5'7" is a problem for this guy, if in fact he is trully 5'7". Sanders was 5'9" but he was 205. That's why they need to get some muscle on this guy and get him up to 190 I beleive. Get his legs built up and big and he will be much harder to take down. These short guys have such a low center of gravity and when you put big legs underneath them they are much harder to take down. I say give this guy the ball.
