might be the most damaging victory in Dallas history
Not really, there's still next week. You didn't think we'd avoid the chance of a do-or-die season ending loss that also would have us finish at 8-8 again did you?
Now you could argue that if we win next week and expectedly get thumped in the wildcard game the following week resulting in Garrett and co. returning next year that it would be our most damaging victory.
But even if winning means Garrett comes back for another year, he'd likely be gone the next time we miss the playoffs. On the flip side, if we lose and Jerry cleans house after this season, do you really think he'll hire and empower a real HC like he did with Jimmy and BP? I doubt it. My money is on him hiring another glorified coordinator/fake HC/puppet and the only thing that will change is the names.