McTaggart ran down a list of possible trade candidates:
Ryan Doumit, Pirates-Probably the best option on the list, but is still a backup on the Pirates. Owed $5.1M, but could probably get Pittsburgh to eat some of that. Olney tweets that he's definitely available and shouldn't cost too much.
Brian Schneider, Phillies-A reasonable option and only makes $1.5M this season. Not sure how anxious Phils are to move him.
A.J. Ellis, Dodgers-Don't know who he is, but he's their third-stringer.
Kelly Shoppach, Rays-Offense has been terrible the past two seasons. Not sure of his defense, but would be better off using in-house options unless club sees something.
Tyler Flowers, White Sox-Decent MLB-ready catching prospect, starting gig blocked by Pierzynski. Not sure if they would trade the prospects needed for an interim player. They could and just get different prospects in the off-season, though.
Yankees-McT mentions their depth, but doesn't think the Astros would be looking for a prospect. If Montero is ready, though that would make Russell Martin potentially available, though. Martin signed a $4M deal in the offseason, so he's probably out of our price range unless the Yanks ate at least half of that.
http://brianmctaggart.mlblogs.com/archives/2011/03/catching-options-available-for-astros.html