You would need both in a game like that. Each would pitch 3-4 innings. Otherwise, you're blowing through Loe, Saito, Hawk, etc. since none of our relievers can pitch more than one inning. Now one bad game gets worse, because you've blown through the bullpen. I know it HASN'T happened recently, but it has happened earlier and could certainly happen again. Don't get me wrong, I would rather have an effective LHP in his place, but until one exists he is basically insurance for a starter getting blown out really early in a game. For that matter, there may come a point where the pen is really taxed and you need an inning out of him. This is how he was used earlier in the year. We just went through a stretch where the bullpen could be used almost exactly as you want to use it, and that usually doesn't last too long.