Hope this might help you.
Jeff Weaver v. Cardinals this year: 2 starts, 13 innings, 15 hits, 9 ER
Career post season : Weaver is 0-1 with a 7.36 ERA in three playoff relief appearances. I don't put much value into his postseason ##s but I don't see him slowing down the Cardinals offense much. I am also slightly biased towards the Cardinals too but I hope the numbers help you out some.
Cardinals win 8-4