Getty Donovan Ezeiruaku #41 of the Dallas Cowboys We have heard plenty in the last few months about the revamping of the Dallas Cowboys defense, a process which started with the firing of former defensive coordinator Matt Eberflus and went on through the hiring of new 34-year-old defensive coordinator Christian Parker. The Cowboys allowed a franchise-record 511 points last season, which was also the most in the NFL , and were rated as the team with the worst pass-coverage unit in the league by