Cowboys return to 'Hard Knocks' for 2021 season, will be featured for third time in show's 20-year history | CBS Sports Headlines Cowboys return to 'Hard Knocks' for 2021 season, will be featured for third time in show's 20-year history Filming will begin at the team’s California training camp in … Continue reading Cowboys return to 'Hard Knocks' for 2021 season, will be featured for third time in show's 20-year history