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