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