The Cardinals have knocked around a pair of lefties the last two days and they get another here, but that success against lefties is atypical for this lineup. St. Louis owns just a 76 OPS+ against lefties all year, and they scored a total of four earned runs in their four previous matchups with southpaw starters. DJ Herz has thrown a pair of gems with the Nats mixed in with four mediocre starts, and while he's struggled with homers, the Cardinals are far worse at collecting them against lefties than righties. I'll back the Cardinals offense regressing back to its normal level against lefties here.