i dont think he played on special teams. he's a workhorse who saved his best games for at miami (200+ yds) and against VT (175ish yds). the only reason he wasn't the feature back at OU, and i assume you probably all know this, was because AP was there so he had to transfer.
as far as the comparisons to MBIII and Emmitt go i have to say he is more like emmitt. very tough runner with a comprehensive set of tools. not the fastest, not the strongest, but fast enough, tough enough, and most importantly he is a football player