Contrary to popular belief, Piazza was actually playing fairly well. The best part was that he was playing every day due to being the team's DH, yet was eligible at catcher.
With all that said, I just dropped him for Estrada because my DL spot is already taken with Thome. Piazza is out 4-6 weeks.. too long a wait for a catcher. Estrada's not too big of a dropoff, although he plays far less games (and it's tough to tell which ones he sits out... ugh, I hate having an average catcher).