The Dallas Cowboys had one of the league’s best offenses this past season, but with Dak Prescott’s health always looming as a potential concern, Dallas decided to add some extra insurance behind their four-time Pro Bowl quarterback.

The Dallas Cowboys added a third quarterback to the roster to play behind Dak Prescott and challenge Joe Milton III.

Milton, of course, was raw when he came out of Tennessee two years ago and slipped to the sixth round, where the Patriots took him. The Cowboys brought in him by trade last offseason, and there’s no doubt he is still raw. His numbers in four appearances ...