Seeing as how they are using a committee in washington at the moment, I'm surprised the owner of Rodriguez hasn't signed Lidge. Would be frustrating to have Rodriguez taking up a starting spot and seeing Lidge come in for the save opportunity.
I don't see anyone on your roster that is worth an obvious drop to acquire Lidge in the hope that he can get you saves as a part time closer. Plus you already have 4 closers, which should be enough.
If you really want him, I would package two of your players and make a 2 for 1 trade with another team, to improve a position where you are weak, and then use the open roster spot to pick up Lidge. To take it a step further I would then package Lidge and either Broxton or Aceves and try and get a single, better closer in return. Someone might want quantity over quality at the RP position in your league, especially if they only have 2 closers.
Feel free to help with either of the following:viewtopic.php?t=443742viewtopic.php?t=443824