I'm not sold on that defense. They got off to a good start, completely shutting down Trubisky and the Bears in week 1, then secured a win in week 2 with a red zone pick of Cousins.
After that? Not so good. A look at the starting QBs they faced? It's not a real strong list.
Yes, they faced Wentz and Prescott. In the game against the Niners. Garappolo only threw 20 passes because they didn't need to. But the win over SB winning Chiefs? That was against Matt Moore, not Mahomes. The win over Carolina? That was against Kyle Allen. Win against Washington? That was against Haskins. The win against the Giants? That was Daniel Jones. The second win over Detroit? That was against somebody named David Blough. The win over Denver? That was Flacco and I think he's now out of the league. And they beat Mitch twice, and he was playing hurt in the second game.
5.7 in yards/play against was 22nd in the league, and 26th vs the run. Their pass D numbers were dressed up due to some many weak QBs they faced.
Yeah, they aren't anywhere near 13 wins this year.