Do you know how many days off you get in a post season run? You play about 4 games a week if each series goes to 5/7/7. You're not wearing out your bullpen arms, which means Albers, Aceves, Bard, and Pap will be available virtually every game. Plus Beckett, Lester, and Buchholz all go deep into games. You're not going to need your janitors (i.e. Williams) to come in and try to keep a game close.