Go back to before the Super Bowl......late 60's the NFL Championship believe it was called then. Era of Bart Starr, Unitas, Jim Brown. Never saw either of these guys with beating the chess look what I just did.....Were real pros in there time. Most tough runner was Jim Brown and did it for years. Take more to bring him down than just one man. Never wore down....like a bull. In his prime there was no better so take it for what its worth.