Atlanta, GA – Derek Lowe pitched into the seventh and 1, in the game set.
Lowe (9-12) scattered three hits and a run, while fanning six and walking two, and Craig Kimbrel tossed a scoreless ninth to set a new major-league rookie record with his 41st save.
Chipper Jones launched a solo homer and Dan Uggla drove in the other run for the Braves, who snapped a two-game slide.
Michael Morse's seventh-inning home run was the lone offense for the Nationals, who have dropped seven of eight.
John Lannan (8-11) fanned six and walked one over seven full frames, but was tagged for seven hits and three runs -- two earned -- in the loss.