If he develops some lateral movement and a sense of where the hole is developing, I think he could make it as a return man with some time catching balls out of the backfield. He strikes me as being mostly a downhill kind of runner - VERY fast, but I just don't see a lot of lateral movement to make the first few miss. But I could be wrong...
That's the same thing they said about Michael Lewis when he first started with the Saints but he had a pretty good run... the thing that hurt him was the fact that he was a 30 year old rookie or he'd still be playing.