According to MLB.com's Bill Ladson, the Astros wanted LHP Ross Detwiler as a centerpiece to any deal with the Nationals for Bourn.
LHP Ross Detwiler, is 25 years old, and has thrown 15.1IP in six games for the Nationals - with one start. He's spent most of his time at Triple-A Syracuse, with a 4.53 ERA/1.49 WHIP, in 16 starts.
But I guess it doesn't matter now, does it?