Peterson went 1-for-3 with a home run, two RBI and two runs in an 8-5 victory over the Nationals on Friday.
He extended the Braves' lead to 2-0 in the second with a 398-foot solo shot, and later came home on Anthony Recker's blast in the sixth. It was Peterson's first round-tripper since July 22 versus and only his fourth hit in 26 at-bats in August.