I still think it's a huge mistake to overwork Joba as a starter...
...because it is a good idea to take someone that's been a starter his entire career and dominated and make him into a closer...
You mean like Dennis Eckersley, John Smoltz or, who's that guy with the Yanks, er, Rivera?
They ALL start off as starters (for the most part).
Rivera was a mediocre starter. Joba has shown he can dominate at the major league level as a starter.
Smoltz was moved to the closer role due to injury/fatigue, and it was after a long career as a starter. Joba was moved to the reliever role because they needed a pitcher in the bullpen in 2007, not because of injury/fatigue.
Eckersley was a starter who declined and ended up prolonging his career as a reliever. Joba is a young pitcher who was a reliever out of necessity and is being moved back to his natural role.
Chamberlain should be a starter, especially with Rivera having career years at his age. The bullpen is fine. He belongs in the rotation.