With this team how can I get Roy Halliday, Fransico Rodriguez, and Zach Greinke?

I don't see why you want to do that. You can't without draining some of your real talent. You have 7 SP's and 2 closers. Look in the FA list and find another closer. Then drop Choo. Frankly, you don't need Halladay, Rodriquez, nor Greineke. Firm up your closers and kick some . You have the team to do it with.