As the Dallas Cowboys head into the Hall of Fame Game tomorrow, they have more than their share of injuries. No one cares about an extra fifth exhibition game, but when your star QB and top offensive and defensive player are involved, it deserves discussion and analysis.Dak Prescott’s shoulder issue continues to prevent him from throwing. Amari Cooper’s ankle still bothers him, and he has not passed his physical. Meanwhile, DeMarcus Lawrence is coming off back surgery and just activated off the PUP list.