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