Most notably is Hank Blalock. With Galeana and Guzman on the team, I don't need to keep Blalock and I would let him go into FA. It would be nice to get something back for him, and he will go at a discounted price for your typical 3.5 2B/3B. Kills righties, bench-worthy v. lefties. Has been for a decade.
Laroche and Bay are really the only other two, and they would be moved for roster flex purposes. Their contracts expire this year, so I'm guessing only a competitive team might want to take them on.
Looking for: Prospects, younger (expectantly worse) replacement position players (not necessary), a real catcher. Take a look