NFL Primary LogoNFL Alternate LogoNFL Wordmark LogoNFL Team History Who is the greatest running back in the NFL of All-time? Walter Payton Barry Sanders Franco Harris Larry Csonka Gale Sayers Curtis Martin Marcus Allen Adrian Peterson Thurman Thomas Tony Dorsett Earl Campbell Jerome Bettis LaDainian Tomlinson John Riggins Jim Taylor Jim Brown Edgerrin James Marshall Faulk Emmitt Smith Eric Dickerson …