Sean Casey, 1B
Fast fact: Finished in the top 10 in batting in the NL three times -- 1999 (.332), 2004 (.324), and 2005 (.312).
Lowdown: Watch out, Thomas Menino. The Mayor has come to Boston. Sure, he's the nicest player in the big leagues (that's not even a competition) and takes clubhouse chemistry through the roof, but for the Sox, having a .301 career hitter coming off the bench is even more important. And he'll be able to provide Youkilis some necessary rest.
(Getty Images Photo / J. Meric)