How fast is the fastest NFL football player?

The fastest NFL football player, measured in terms of the fastest 40-yard dash time at the combine, is Chris Johnson. He was clocked with a forty time of 4.24 seconds. The second fastest time was set by Dri Archer at the 2014 combine with 4.26 seconds. As Johnson's career is winding down, it is likely that Archer is the fastest player in the NFL.