Indeed. But a 6 man rotation does make a bit of sense in this situation. Paps is a rookie and has never thrown a full season before. Matsuzaka is a great unknown, under tremendous pressure, and is used to 5 days off. Schill is old, Wake is old. Beckett has recurring blister problems, and has only gone over 200 innings once (in '06).
That being said, the only thing missing in the 6th starter. I would question the priorities of the front office if they went looking for a 6th starter when there are so many other holes to be filled (RF, short, closer).