Look at the teams. Trades are situational. The team trading Moyer (anyone else aware that he's 41 years old) is three years away form contending. By then Moyer is gone, C J, virtually done; how many catchers you know still going strong at 36?

The trade was offerd with this in mind: be attractive enought to succeed without giving up anything that will hurt you when you're in a position to contend.