Chris Johnson is the best running back in the NFL right now!
Barry Sanders was the best running back known to the NFL.
Walter Peyton is probaly the best ever but O.J. Simpson, Adrian Peterson are great
THE BEST RUNNING BACK IN THE NFL!!!!!!
Brandon Jacobs Is Currently The NFL'S Biggest And Tallest Running Back, But Overall Would be Jerome Bettis Who Was 5'11 But Was 275lbs
Adrian Peterson! LaDanian Tomlinson