The probability of a 6 ft + RB running a 4.51 is very rare. I just don't believe it.
Not nearly as rare as you might think, but...
For comparison's sake, Melvin Gordon ran a 4.52 at the combine...AT TWO HUNDRED AND FIFTEEN POUNDS
If Gus Edwards is ANYWHERE in that neighborhood, he's a freak.
I said when he committed that he reminded me most of Le'Veon Bell and LB ran 4.6 at the combine.
Couple other similar body types and their 40's:
Beanie Wells (6'2, 235) - 4.38
Toby Gearheart (6'0, 230) - 4.50
Brandon Jacobs (6'4, 256) - 4.56
Arian Foster (6'1, 227) - 4.68
It's not unbelievable, but it does put him in some pretty good company.