I have compiled my own list of quality running backs that deserve a camp invite and any applicable info.
darryl stephenson (youtube highlights), justin beaver 4.41, danny woodhead 4.33, steve korte 4.32 on a slow track at 235 lbs (being looked at as a fullback), not alot of people would project a 4.3 rb to fullback, but the nfl is nothing if not creative, jacob hester 4.6 at 225 lbs, peyton hillis 4.57 pro day at 240lbs, jayson bird(out with injuries most of senior season).Not sure of Bird's forty, but looks fast on the field at 220 lbs. Interesting comparison here in that Bird's teamate, a fourth string black backup whoran a 4.85 is getting some nfl interest.Go figure. Justin Boyle (nfl body, but played behind the worst offensiveline in div.1, still average 4 ypc in acc)
For brevity's sake I won't list anymore as a number of them have already been listed in other posts. These are just my personal favorites.