Sounds like the same experts who graded him coming out of high school.NFL.com
Losers
Josey Jewell, LB, Iowa: The instinctive tackling machine is an outstanding football player, but his disappointing workout highlighted his athletic limitations. Jewell posted a pedestrian 4.82-second 40-yard dash and didn't impress in change-of-direction drills. Although his game tape suggests he's a terrific player, it's hard to justify a high pick on an inside linebacker that runs slower than a 4.7-second 40.
The combine is a way to justify paying a few guys multi-millions, while down grading the majority to a few hundred thousand rookie deals.