Barry Sanders was the best running back known to the NFL.
Chris Johnson is the best running back in the NFL right now!
Larry Bird no question
It depends on who you're fighting.
Tony Dorsett is the best running back to play for the Dallas Cowboys
barry sanders was the best running back of all time. he was fast, strong, and elusive i agree
Best running-back was obviously legendary Walter Payton #34.
Marion barber is the best running back on madden 09 point blank . got a problem wit it?
The best running back is Tyler Olsen (aka ~T-23~) plays for the south sevier rams!
the best running back in u of m is Jamil Khuja. the best running back of u of m is really Sam McGuffie.
Julius Erving,Michael Jordan,or Wilt Chamberlain
13, 7, 9 , 10 alltime bests
THE BEST RUNNING BACK IN THE NFL!!!!!!
Adrian Peterson is the best.