|9/21/07||Reinstated SS Cristian Guzman from the 15-day disabled list.|
|9/17/07||Nationals claimed RHP Enrique Gonzalez off waivers from the Diamondbacks.|
|9/14/07||Acquired OF/1B Andrew Lefave from the Milwaukee Brewers as the PTBNL to complete the Sept. 4 trade for LHP Ray King.|
|9/4/07||Traded LHP Ray King to the Milwaukee Brewers in exchange for a player to be named later; Selected the contracts of LHP Ross Detwiler, OF Justin Maxwell, RHP Jonathan Albaladejo, LHP Arnie Munoz and OF Ryan Langerhans; Transferred RHP John Patterson and RHP Jason Simontacchi to the 60-day disabled list and activated LHP Micah Bowie from the 15-day disabled list.|
|9/1/07||Recalled LHP Matt Chico from Triple-A Columbus; purchased the contract of RHP Winston Abreu from Columbus.|
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