Cowboys QB Dak Prescott reveals meaning behind Super Bowl shirt move originally appeared on The Sporting News. Dallas Cowboys quarterback Dak Prescott made a bold statement before training camp by wearing a Super Bowl XXX championship T-shirt on the team charter. Speaking after the Cowboys' second training camp practice on Thursday, Prescott addressed the attention it received. "Set the tone, I think the tone's been set," Prescott said, via Cowboys staff writer Calvin Watkins. AdvertisementAdvertisement AdvertisementThe Cowboys have a lengthy championship drought, failing to reach the Super Bowl since winning the 1995 season.