To be fair:
Schoeneweis vs. RHers: .275 AVG, .703 OPS
Buehrle vs. RHers: .285 AVG, .762 OPS
Garland vs. RHers: .234 AVG, .708 OPS
Colon vs. RHers: .246 AVG, .699 OPS
Granted he faced way few hitters, given that sample i'd say he's pretty capable of getting righthanders out.