The offense too. And don't forget Wheeler got hurt. He has declined to say it affected him (and pitched pretty well) but it did happen.
Hard to read much into Nola's September record when this September isn't really September (and last year he had his routine disrupted). But, again, it happened.
I think it comes back to the bullpen there as well though, Joe had to stick with them for one more batter or one more inning a few times too. And we also had no 4th or 5th starter to try and pick anybody up (to say nothing of the doubleheaders).
I wouldn't say it was an epic collapse in a normal season, I'd say it was three bad weeks that could have easily been followed by three more great ones, especially without the doubleheaders and another home stand. Now, that doesn't mean this team looks like they were going to make the playoffs in a normal season, but who knows. The Nats were 27-33 last season at this point (and we'd won 34 games).
Martinez actually was on the hot seat for a bit last year too, but the difference is the Nats had actually won already for many years, and we have not.