The Cards have thrown for 9 TDs and the Rams D has only allowed 2 passing TDs. I'm looking further into this and looking at how the teams have done in passing TDs outside of playing the Rams.
The Seahawks have 4 on the year and 1 of those was against the Rams, the Skins have 3 with 1 against the Rams and the Steeler have 4 on the year with 3 against the 49ers and 1 against the Pats (both the 49ers and the Pats aren't very good at defending the pass).
Now break down who the Cards have been throwing TDs against. Chicago has given up 8 (4 to us, 3 to GB and 1 to Seattle), the 49ers have given up 5 (2 to us and 3 to the Steelers and 0 to the Vikes) and the Saints have given up 6 (3 to us, 2 to the Panthers and 1 to the Bucs).
In conclusion the defenses that we have faced actually aren't all that bad at preventing passing TDs (minus the 49ers on the road apparently). Also the teams that the Rams have faced thus far this year aren't all that good at passing for TDs (the Steelers are decent in this area, but were without Ben for a big chunk of the game). Something has to give, either the Cards who have scored the 2nd most passing TDs in the league will wilt or the team tied with the Cards for 2nd fewest passing TDs allowed will break. My money is on the Cards because I think that number is slightly inflated for the Rams and because the Rams will be playing on the road where they just aren't as effective.
