Been looking at this one myself...
Kirk Rueter has a 1.80 ERA over his last 20 innings...is 8-3 with a 2.89 ERA lifetime against St. Louis, including a 5-0 mark and a 2.16 ERA at Busch.
Kile has lost the most games against any opponent in his career to San Francisco, going 5-14 with a 7.13 ERA in 25 games.
Even with all the above...still gonna look into it a bit more. But glad to see someone else seems to like it.