I do hope relievers are on DD’s deadline radar. But unless you overpay, selling teams have no motivation to deal until they’ve checked in with any and all potential buyer. Unless you can find a contract some team is willing to dump for anything. But relievers like that might not be the solution the Sox need. For example, Mark Melancon can probably be had merely for the price of asking if Mark Melancon can be had. But do the Sox want to bring him back, knowing his salary this year and next are prohibitive? If they get him, he’d better work out fast, because they won’t be able to afford anyone else worthwhile.
Melancon does have a 3.58 ERA across 33IP this year, which appears to be sustainable in spite of his 1.56 WHIP. But his contract pays him $14mill per this year and next. Is he worth it? He flopped last time in Boston, but it was only one year. Bad seasons do happen.
Personally, no on Melancon. Try Mejia first and see how he does. If he fails, he can be demoted (via DFA) or released with no collateral damage...