On Pete Abraham's blog Will Caroll wrote an article on the Big Three and their innings. Kennedy looks like he should be able to handle a full seasons workload but the other two shouldn't, especially Hughes. Remember back in September when I suggested putting Hughes in the bullpen for the playoffs? Remember how well he worked in relief of Clemens in the playoffs?
In order to limit his and Joba's innings they could move each to the bullpen for half the season. Say Hughes in the bullpen and Joba in the rotation for the first half and the other way around for the second half. This all depends on how Mussina holds up but Mussina's periphereals last year show he was more than a little unlucky last year. I think you`ll actually see this but to a lesser exten than my example.