Dak Prescott prepares for being a starter one day

Dak Prescott is the Dallas Cowboys backup quarterback after Kellen Moore was injured Tuesday. (Star-Telegram/Max Faulkner)
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Dak Prescott is the Dallas Cowboys backup quarterback after Kellen Moore was injured Tuesday. (Star-Telegram/Max Faulkner)

JUST CHILL: Jerry Jones can’t hide his grin on QB Dak Prescott

August 22, 2016 08:59 AM