The debate between Darrell Green and Deion Sanders over who possessed superior track speed centers on two of the fastest human beings to ever play professional football. Darrell Green recorded legendary, verified world-class times on the track, including an official 10.08-second mark in the 100-meter dash, and famously ran an elite 40-yard dash even in his later playing years. Deion Sanders countered with a blistering, legendary 4.21-second forty-yard dash at the 1989 NFL Scouting Combine. While both men exhibited breathtaking, peerless recovery speed on the gridiron, track traditionalists often lean toward Green's sustained sprinting resume, though both remain legendary.