Two great things happened to the St. Louis Cardinals' pitching staff when they advanced to the World Series after a Game 6 win, instead of having to beat the Milwaukee Brewers in Game 7. The good news for the rotation is that Chris Carpenter will be able to start Game 1 of the World Series, instead of having to take Game 7 of the NLCS; the good news for the staff as a whole is that, by not having to throw eight innings until Wednesday, the bullpen will be able to take a breather after pitching more than half the Cardinals' available innings in the League Championship Series.
If Carpenter comes out and established a rotation that might actually pick five innings a game, things are great, and Marc Rzepczynski, Fernando Salas, and Jason Motte won't have to worry about pitching two innings a night. But even then the Cardinals will have to find another starter capable of shouldering the Jeff Suppan role in this World Series. The rotation as constructed now has Kyle Lohse, Jaime Garcia, and Edwin Jackson following Carpenter in that order, but the time off gives them a chance to remake that order.
My guess: Jaime Garcia will be switched with Kyle Lohse so as to put him in Busch Stadium Game 2, where his (maybe or maybe not predictive) home-field advantage will come into play. Of course, at that point you have consider just how keen Tony La Russa might be to have Kyle Lohse pitch in the unparalleled hitter's park in Arlington.