Mistakes have put Dak Prescott and the Dallas Cowboys in tough position vs. the New York Giants after one half of play. Entering their annual Thanksgiving matchup at AT&T Stadium, the Dallas Cowboys were looking to make it a season sweep over their NFC East rival, New York Giants. But after a handful of mistakes and missed opportunities, they still have a lot of work to do, with the Giants leading the Cowboys 13-7 heading into the locker room at halftime. Cowboys quarterback Dak Prescott has been behind a good portion of those mistakes, tossing two interceptions, including a throw…