Cowboys QB Dak Prescott to undergo season-ending surgery on injured hamstring NFL.comDak's season over but 'prognosis is wonderful' ESPNJerry Jones: Dak Prescott will have surgery tomorrow and miss the rest of the year NBC SportsDallas Cowboys owner, general manager Jerry Jones says QB Dak Prescott will have season-ending surgery on torn hamstring CBS NewsDak Prescott's injury leaves Cowboys with questions even beyond QB FOX Sports