David Aardsma, RP
Fast fact: His 23 strikeouts last April led all American League relievers.
Lowdown: Acquired from the White Sox Jan. 28 for a pair of low-level minor leaguers, the Sox have been hoping for the guy who got off to a strong start last season rather than the one who faded fast. He's still around, but out of options, so he could get dealt for little return if he doesn't stick with the big club following the Japan trip.
(Getty Images Photo / Nick Laham)