The Dallas Cowboys have still yet to give up more than one touchdown in a game over the first four weeks. When Dallas Cowboys star quarterback Dak Prescott needed surgery following the team’s Week 1 loss, to some, all hope seemed lost. Suddenly, it seemed the weight of the world rested not just on the shoulders of backup quarterback Cooper Rush, but on those of the Dallas defense as well. It’s safe to say the Cowboys defense has more than lived up to those heightened expectations. The Dallas defense has yet to give up more than one touchdown in any…