I have the feeling Wells is calling the quits, so no telling how long he will be in the rotation. Its been kicked around on EEI, and SOSH as a possibility. He's definetly out after this year. I think he will make one more shot at a come back, but he has the same knee problem as foulke and he is a lot older than foulke. Call it a hunch, but considering the time Foulke was out last year, I think you can count on Wells to spend significant time on the DL if not have to miss the season. I think he may be done.
Dinardo could stick in the rotation, if Foulke can assume the closer role, he will and Papelbon will come in relief for multiple innings. He will probably come in a lot when Dinardo pitches, like Seanez did, to stretch him out. When Hansen is ready, they call him up, move Papelbon to the rotation. Purely speculation but its got some logic behind it. This is all assuming Clemens doesn't come to Boston. If he does, that changes everything.