Yup! This is the problem sometimes with various coaches, GM's, and scouts, (Fisher...
cough...Snead...
cough), they get "wowed" by a player at the Combine and on Pro Days due to athletic ability alone. Some work out, many don't. Heart, desire, and brain matter counts as well.
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https://athlonsports.com/nfl/10-most-athletic-freaks-nfl-combine-history-2016
Tony Mandarich
In hindsight, the most impressive thing the “Incredible Bulk” did was pass his steroid drug screening during the Combine. At 304 pounds, Mandarich ran a 4.65 in the 40, exploded for a 30” vertical and 10’3” broad jump, and ripped off 39 reps of 225 pounds on the bench press.
Mike Mamula
After all these years, Mamula remains the go-to cautionary tale of the Combine. The BC beast vaulted up draft boards after a 4.58 in the 40, 28 reps of 225 pounds on the bench, a 38” vertical and a 49-of-50 on the Wonderlic Test. Mamula never looked as good in pads as he did in shorts.
Robert Griffin III
The fastest quarterback in Combine history, RG3 was a track star on the fast track to NFL (at least initially) and commercial superstardom — with a blistering 4.41 in the 40-yard dash to go along with a dunk contest-worthy 39” vertical.
Vernon Gholston
One of the main reasons teams remain skeptical of off-the-charts Combine stats, Gholston was the classic “look like Tarzan, play like Jane.” In shorts and a muscle shirt, Gholston ran a 4.67 in the 40, had 37 reps on the bench and lifted off for a 35.5” vertical and 10.5” broad jump.
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Throw in Tim Tebow, Aaron Curry and many others that don't come to mind at the moment and it goes to show what a crapshoot signing the right players really is. Hope Truesdell stick with the Vikings and does well but the odds are against him.