I can give an answer to this no way question in my mind, when we're talking about the guy whose sheer speed dominated and revolutionized the game and how the NFL teams had to devise how to play him in Bullet Bob Hayes, who also made his dominance felt in the fastest contest in the Olympic Games, and we ain't talkin about just a 40 time but a lengthier 100 meters.
they can keep their scrubs like 4.14 Alexander Wright, ..and Randall Williams, and even HOF Deion Sanders and his supposedly 4.29 per pre-draft NFL combine - but I will always cast my vote on the " World's Fastest Human " in Bullett Bob Hayes.