Why Didn't the Astros move these guys?

The pitiful Astros have been involved in 4 major trades (and another substantial  one in trading Jeff Keppinger to the Giants this year) in the past 2 seasons, all at the deadline. Last year, they dumped both Roy Oswalt and Lance Berkman for prospects, rather obvious moves. This year they traded Hunter Pence and Michael Bourn, both rather young players, for lots of good prospects. However, I was really surprised they didn't make more moves. I am thinking of 3 guys in particular. Firstly Wandy Rodriquez is making 7 million dollars this season and will make 10 million next year. He has a WAR of 2.1, giving him a WASP (this season) of around 3300 (making him over the Halladay Standard. He is also 32 years old. There are/were teams in the hunt that needed starting pitching (there were rumors about Wandy going to the Yankees, but it never materialized). There is really no excuse for the Astros not moving him for prospects. Similarly, Outfielder/First baseman Carlos Lee should have been moved, and was not. He is in the middle of an absurd 100 million dollar contract, and is making 18.5 million dollars. Even with his 4.4 WAR, he still has a WASP of 4204. His 475 OOP (39 SOOP) and 1.14 PPG (16228 PPGS) are hardly worth the big salary (if you are unsure what any of these statistics mean, check the pages above) and he is 35. Surely someone could have used this guy and would have given up a couple of prospects and freed up money for the 'Stros. Starting pitcher Brett Myers is the third guy on this list. He is 31, has a WAR of just .6, and a salary of $ 7 million (10 million dollars next year). Holding anybody with a 11666 WASP when you are a rebuilding team is inexcusable. The Astros' management sure have provided some head scratchers.