The GreenJackets managed just five hits, but a pair of wild pitches and an Adam Duvall homer was enough to force extra innings. Rome gave the game away on another wild pitch in the bottom of the 13th that allowed Jeff Arnold to score from third for a walk-off win.
"That was the last thing in my mind," Arnold said. "I was ready to run on contact and do anything, but I didn't expect a wild pitch."
Arnold started the final inning with a double to the gap in left-center field. Pinch hitter Ydwin Villegas bunted him over, and Rome intentionally walked the next two batters to load the bases.
With one outfielder added to a drawn-in infield, the Braves were poised to throw home on any batted ball. But GreenJackets batter Bobby Haney needed only to get out of the way as Rome reliever Chasen Shreve (0-2) fired a pitch in the dirt that bounced all the way to the backstop.
Arnold scored easily, and the GreenJackets (11-20) claimed their third win in five games.
It was the second time this season Augusta has managed just five hits and still won.
"Today I don't know where our bats were," manager Lipso Nava said. "We're having trouble with men in scoring position. We have to bear down with men in scoring position. Obviously, the pitching part made our job easier for us."
The GreenJackets used just three pitchers to go the distance. Starter Seth Rosin rebounded from a rocky outing with a quality effort, allowing two runs on six hits and no walks over seven innings.
Jacob Dunnington gave up one run over three innings to get Augusta to extra innings, and Stephen Harrold (2-1) scattered three hits over the final three scoreless innings to get the win.
"Outstanding," Nava said of his bullpen. "They've had their bad days, but they're steady."
The Braves wasted a quality outing from 19-year-old starter Carlos Perez, who allowed one run on two hits over seven innings. His only blemishes on a seven-strikeout night came in the fifth when a pair of wild pitches allowed Adam Duvall to score from second.
Tyler Stovall blew the save opportunity for Rome when he gave up the two-run homer to Duvall with two outs in the bottom of the ninth of a 2-0 pitch.
Duvall finished the night 2 for 4 with two RBI and two runs scored.