If folks would like a sampling of the effect of a defensive secondary on opposing passer rating, follow the Seattle Seahawks for the remainder of this season.
Since 2011, Seattle has been one of the best teams in the league against the pass. It's essentially been their calling card. Of course with Richard Sherman, Earl Thomas, and Kam Chancellor, that stands to reason.
Coming into last night's game, Seattle was one of the best teams in the league against the pass this year, surrendering an opposing passer rating in the mid-70s on the season. That's well below the league average. They were 6-3 at that point.
Last night they were beaten 34-31 at home, in large part because they surrendered a passer rating of 115.5 to Matt Ryan. That's the third-highest passer rating they've surrendered at home since 2011. The average passer rating they've surrendered at home since 2011 is an incredible 70.8, which is a huge part of what's made them so difficult to beat in Seattle.
Of course we know they recently lost Richard Sherman and Kam Chancellor for the season. We'll see how Seattle does the rest of the year under those conditions.
After they lost Earl Thomas in early December of last year, they surrendered the following passer ratings:
Aaron Rodgers: 150.8
Jared Goff: 67.9
Carson Palmer: 111.7
Colin Kaepernick: 122.3