I said, "I can almost gurantee it". I say this because I happen to follow the NFL draft pretty closely and because I have been around Defensive lineman about 15 years of my life (playing and coaching).
It is exceedingly rare to find an NFL prospect who is close to 300 lbs who runs a 40 under 5.0. If there was a 300 lbs highschool kid from Florida who ran a legitimate 4.9 40, he would almost certainly be flooded with offers, it is really that rare.
Some of the most impressive athletes in the world, haven't been able to touch this mark.
Glenn Dorsey was 6'2" 315....ran the 40 in 5.13
BJ Raji ran the 40 in way over 5 (something like 5.25)
Peria Jerry....(1st rounder last year)...this guy was noted for his rare speed and impressive quickness....ran the 40 in 5.12
Now I started thinking, which is more likely:
(1) Doral Willis (a kid trying to decide between Bama St., and a greyshirt to MN) having some of the most impressive athleticism by any DT(especially 300 lbs DT) in the entire country. That he is quicker and faster than 1st Rd picks in the NFL; or
(2) that his number is inflated?