The Yankees will have to do something about Joba and the 5th starting position if they want to contend in the post season. If they will lose in the postseason, it will be on their hands, IMHO. As much as a great job as Hughes has done in the bullpen, he needs to be the 5th starter. Joba can go to the setup position. So who will replace Joba is the question? CC, Burnett, and Andy are starters that probably won't blow the Yankees chances for a WS run this year. It is Joba and Mitre.
And you need a 5th starter in the postseason because.....?