I do not agree with dropping Lo Duca. Several reasons:
1. He is batting .388, currently one of the best in all baseball, not just the NL.
2. He can play 1B for your team. Having a player that can play multiple positions is very valuable.
3. Martinez, is good right now, but not proven as full timer at catcher. Good pick-up and someone to keep in keeper leagues for the high upside. Lo Duca has a decent track record and good sticks around him.
That is my 2 cents worth!!!
I will not rest until I have you holding a coke, wearing your own shoe, playing a Sega game featuring you, while singing your own song in a new commercial starring you, broadcast during a super bowl game you are winning. Show me the $$$!!!