As per Kat O'Brien of Newsday:
As some of you noted, Brian Cashman said on WFAN that they plan for Joba Chamberlain to be a starter all next season.
He confirmed that to me in an email.
If health is not a concern, they want Joba in the rotation.
Of course, we have known this all along. But a confirmation from Cashman is a good thing.