What happened: Parker addressed the fallout from Dallas' opener by saying the staff has to watch the tape, be critical of mistakes and find substance in the failure. That came days after the Cowboys defense faltered in Christian Parker's coordinator debut and Dallas opened 0-1 with a 28-20 loss.

Why it matters: Accountability matters, but NFL defenses get judged on whether the corrections show up immediately, not on how well the coach explains them. Until this unit turns those self-scouting promises into fewer points allowed, it is fair to see the defense as the thing capping Dallas more than carrying it.