A win is a win, right? Sometimes it comes in the form of Wednesday night’s gem: an outstanding pitching dual duel between Houston star Roy Oswalt and Washington rookie Mike O’Conner. O’Conner was great, allowing only a three hits over 6.0 innings and holding the Astros to one run on a Morgan Ensberg homer. Oswalt was even better, mowing down Nats for seven innings before finally allowing Damian Jackson to score on a balk that…