Become a DIEHARD! alldlls.com/join The Dallas Cowboys are making major changes to their struggling defense. Former NFL head coach and defensive coordinator Mike Pettine is joining the staff as a senior defensive assistant, and Christian Parker is moving from the sideline to the coaches’ booth to call the defense. On this episode of DLLS Cowboys After Dark, Jeff Cavanaugh breaks down what these moves mean for Dallas. Can Pettine help Parker get the defense on track? Will calling plays from the booth make a difference? And are these changes enough to fix a defense that has struggled to stop anybody? We’re breaking down the coaching shakeup, the biggest questions facing the Cowboys, and what to watch for next. Do you believe these changes will work? Let us know in the comments! Subscribe to DLLS Sports for daily Dallas Cowboys coverage, analysis, reactions and more.