Did Deion Sanders ever run a 3.9?
Deion ran a 4.17 at the NFL Combine in 1989. 1990 was the first year that the timing was fully electronic. In reality, Deion was as fast as he wanted to be. In the context of actually playing the game, Jimmy Johnson once said that Deion was the only player he'd ever seen faster than the ball, hence Deion's reputation for being the fastest player of all time in pads.