It wasn't a rotation that was supposed to be good, but it was supposed to be solid enough to keep the potent offense in the majority of the games. Therefore, when the pitching holds the opponents to 4 or less runs, or even 5 runs, the offense was supposed to be able to bail them out a large majority of the time. In fact, the offense did just that during the months of April, June, and July, to the tune of a 29-12 record (.707). Not so much in May, when their record was 10-10 in such games. Not bad, but the way this team was built, the offense has to win those decently pitched games.
A lot of people disagree with that approach to building a team. I disagree with it. But on paper, it should have worked.