Speed is something you cannot teach, and that's the reason so many NFL put a premium on finding the fastest players when they are scouting them at the combine in Indianapolis .
Whether that speed translates into ultimate and sustained NFL success is a different story, but many collegiate player's draft stock has improved because of the numbers they put up at the combine.
At the scouting combine, which starts next week, players are given two chances to run the 40-yard dash, and the best time of two will be recorded as official.
Here are the fastest 40-yard dashes of all time at the NFL scouting combine, according to NFL.com .
This article originally appeared on USA TODAY: NFL combine fastest 40 times of all time
