His size is fine (5'9, 205). He actually came to PSU as a speed demon, but blew his ACL and seems just now getting back to form.
His last few games he became a much more confident and complete runner, making better decisions in lanes, better vision, better quickness.
That said I'm not sure of an NFL role for him. I think he's got a shot to be drafted late. I'm hoping he gets a combine invite.