And now that the Broncos have Peyton Manning, the Manning-Tom Brady rivalry becomes Denver's rivalry. The Cowboys are a divisional opponent, but a rivalry? “I’m starting to learn about it,” Barwin said. Time, contrition and a lessening of the quality of the NHL teams has diluted the once great rivalry. It has been a long time Eagles linebacker Seth Joyner stood at his locker doing TV interviews wearing a “Dallas Sucks” t-shirt. Across the locker room, former Ravens cornerback Cary Williams was talking about how he always “hated” the Cowboys for personal reasons.