Getty The Dallas Cowboys waited until the last minute to ink franchise quarterback Dak Prescott to a major deal last season. The Dallas Cowboys waited until the last minute to ink franchise quarterback Dak Prescott to a major deal last season, signing the dotted line right as the new season kicked off. Prescott signed a contract extension for four years, worth $240 million , which made him the highest-paid player in NFL history at the time. The deal also included an $80 million signing bonus, $