Theo Epstein says a couple of Sox elders are done with the club:

Epstein said that Mike Timlin wants to pitch next season, but it won't be in Boston. Epstein found it remarkable that Timlin spent six seasons with the Red Sox.

Epstein also said he's informed Sean Casey that the team would address more pressing needs, which likely means Casey won't be returning.

I really like both these guys but it's obvious it's time for the Sox to cut bait. Timlin was just bad this season. I hope he finds success elsewhere, but I think a lot of us would agree that he should just retire. Casey was a solid backup, but the Red Sox have better options out there and with all this youth sprouting up, Casey is the odd-man out.