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)

Insiders, outsiders are trying to explain Dak Prescott’s success

August 22, 2016 03:50 PM