1. He won't be able to catch regardless;
2. The Yankees have a lot of DH/1B types;
3. He's doing this, he says, so he can help the team with his bat, but on the season that bat is posting a .268/.364/.411, which aren't the numbers of a 1B or DH on a playoff team;
4. Delaying the surgery -- I'm going to assume he will eventually need it -- could stretch his rehab into next spring training, thereby getting 2009 off on the wrong foot;
5. All of this is being done, according to the article, under the care of "New York Mets medical director Dr. David Altchek." No word on whether or not he was the one who cleared Ryan Church to play.
Look, I admire Jorge Posada's tenacity and desire, but he is no good to the Yankees unless he is healthy and catching, and based on what others are writing, neither of those things are likely to happen absent him shutting it down for the year.