Should I pick up Jenson Lewis and drop Brad Ziegler?

Being a cleveland fan I am very familar with Lewis and you have to be careful with him. When he throws strikes he is a very good reliever but when he loses his control he is useless.When he runs into trouble he has the habit of catching too much plate and getting slammed. Looking at your roster I think a smarter move would be to drop Kerry Wood and not Ziegler. Chi. has plenty of relievers and wood is constantly injuring something.