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