From the Athletic:
Buffalo’s defense has turned a corner. The Bills aren’t a perfect defensive team and are still susceptible to teams overpowering them with their running game. But the pass defense is back to playing the way it did in 2019 when the Bills had one of the league’s best defenses. In the first six games of the season, the Bills were fifth worst in the NFL, allowing a passer rating of 106.9 to opposing quarterbacks. They also allowed 12 passing touchdowns and had only two interceptions during that run.
In the five games since then, the Bills are fourth best in the NFL, allowing a passer rating of 77.3. During that stretch, the Bills are also third in the league in both passing touchdowns against (4) and interceptions (6). While they had games against the Jets and Patriots in that five-game period, the Bills also had to face Russell Wilson, Kyler Murray and Herbert the last three weeks.