Getty Cowboys QB Dak Prescott It has been a busy first week-plus of training camp for the Cowboys , and while there have been positive developments, especially among the team’s receivers, there have also been early injury concerns. The defensive backfield is an issue, but so is the group that is tasked with protecting star quarterback Dak Prescott . Of course, Prescott is coming back from a torn hamstring injury that ended his season in Week 8. At 32 years old, it’s getting more and more