I'm tempted to pick up Uehara given his team and how many opportunities he will have - but who do I drop to get him, Balfour or Gregg? I should also ask if either of those options are worth dropping for Uehara. My hunch is 'yes'.
I'm not big on Gregg so if you really want to pick up Uehara I'd dump him... I don't think Uehara is the long-term closer in Boston though, when asked today John Farrell was very non-committal and said he wants to get Andrew Bailey back on track... in the short term Uehara for Gregg is a good move.