fastest rb
darrell green 4.09 in the 40dash. no reggie bush 40dash 4.04. it was not reggie bush. In his prime darrell green was the only nfl player to run a 3.9 when he got old he ran a 4.2 he is also the fastest player in nfl history. the best kick returner as well. Reggie Bush has never clocked anything better than the low 4.3's. The fastest running back right now is Chris Johnson who was timed at 4.24.