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In its wonderfully anachronistic way, the NFL measures speed by the 40-yard dash time. The thought is that since a punt travels around 40 yards, a coach could determine which players to send after the punt returner by measuring their speed at running 40 yards. But wide receivers need more than raw speed; they need football speed, which gives them the ability to run routes, out-maneuver defenders and accelerate to the end zone. The fastest NFL wide receivers show a combination of raw quickness and football acumen.