Cowboys defensive coordinator Rob Ryan believes that his defense will be facing the best quarterback in NFL history on Sunday. Dallas is set to face New England. "You're talking about the best quarterback, in my opinion, that's ever played the game," Ryan said. "Hell, I know that. He's that good. "You obviously have to attack the source of the passing game and he happens to be the best in the league here. Every ball is going to be on the money, every throw is going to be out of his hand quick and it's going to be to the right place. You have to be at your best."