The Pittsburgh Steelers didn't have their two best defensive players, their two starting wide receivers or much offense for the first half. With all that, they still had far too much for the Seattle Seahawks. Ben Roethlisberger, scrambling and improvising without his usual receivers, finally got the Steelers' offense going. He led three successive lengthy touchdown drives highlighted by Najeh Davenport's runs and Pittsburgh's undermanned defense dominated Seattle in a 21-0 victory Sunday. Roethlisberger finished 18-of-22 for 206 yards and a touchdown.