Nationals Journal - Nationals GM Mike Rizzo is mum on Roy Oswalt report:
"First, the Nationals would have to part with pieces of a farm system they have made a priority to stock. Second, they would have to take on Oswalt's contract, and Oswalt, 32, is owed $15 million this season and $16 million next year. Third, Oswalt would have to green-light a trade to Washington."
The second and third points are the largest stumbling blocks, but the Washington Nationals have a plethora of "disappointing" prospects in their system that would be top propsects in the Astros system. Michale Burgess? Chris Marrero? Justin Maxwell? Ross Detwiler? Colin Balester?
Baseball America rated Burgess' arm the best outfield arm in the system. Given Oswalt's salary (the equivalent of a house with super high local taxes), this is the best the Astros will do prospect-wise.