The Braves, who snapped an eight-game losing streak Friday night with a 7-6 win over the Nationals, were frustrated by leaving 11 runners on base. More offensive struggles wasted a strong start by Aaron Harang, who allowed one run in seven innings.
"It's tough, especially against a team that we know we're trying to make up ground on," Harang said.
LaRoche's homer in the sixth gave Washington a 1-0 lead, but the Braves tied it in the bottom half.
Washington's Tanner Roark and Harang opened with five scoreless innings before LaRoche led off the sixth with his 16th homer.
The Braves settled for one run after loading the bases with no outs in the sixth. Tommy La Stella scored on Jason Heyward's broken-bat fly ball to shallow center field.
Roark also lasted seven innings, allowing one run, six hits and three walks.
BOOS FOR BRYCE
Harper, booed consistently by Braves fans, might have tried to send a message back to the fans by scraping his cleat over the Atlanta "A" carved into the dirt behind the batter's box, as if trying to scuff it. Fans responded with more boos.
SPAN THE MAN
Denard Span's fifth-inning triple gave him a 13-game hitting streak. He has reached base in 35 consecutive games, a streak that began on June 28.
Newly inducted Hall of Famer Greg Maddux and Chipper Jones were among the former Braves players who played in a legends softball game. Jones, wearing shorts and striped socks, homered in his first at-bat. Maddux settled for a double. John Rocker and Ryan Klesko were among other players to easily clear the short fence for homers.
Nationals: Right fielder Jayson Werth was scratched from the lineup as he continues to be slowed by a sore right ankle and right shoulder. He walked as a pinch hitter in the 11th and should start on Sunday night, according to Williams. ... Outfielder Steven Souza, who hurt his shoulder in a collision with the right-field wall and left Friday's game, entered as a pinch runner for Werth.
Braves: Shortstop Andrelton Simmons' sprained left ankle is improving. Gonzalez said Simmons might play by Tuesday. Simmons was no longer wearing a soft cast but had the ankle wrapped. ... Right-hander Shae Simmons, on the disabled list with a right shoulder strain since July 27, said he "felt really good today" throwing in the outfield. He still hasn't thrown off a mound.
Nationals: Left-hander Gio Gonzalez will try to end a streak of four straight losses in his past five starts at Turner Field on Sunday night. He won his first two career starts in Atlanta before a long string of bad luck. Gonzalez has received one run of support in each of his last five starts in Atlanta.
Braves: Left-hander Alex Wood will look for his first win since July 20. Wood is 0-2 in his past three starts, dropping him to 7-9 with a 3.20 ERA for the season. Wood is 1-1 with a 2.25 ERA in two starts against Washington this season.
Copyright by STATS LLC and The Associated Press
ATLANTA, GA - AUGUST 9: Bryce Harper #34 of the Washington Nationals signs autographs during a pregame rain delay...