Atlanta Braves rookie Austin Riley, right, celebrates with Dansby Swanson after hitting a two-run homer off Tony Watson in the eighth inning of Thursday's game in San Francisco. The Braves beat the Giants 5-4 in 13 innings, with Riley's single driving in the go-ahead run in the final inning.SAN FRANCISCO - Austin Riley just keeps delivering.
The star rookie has been at the center of the Atlanta Braves' recent power surge, and his latest jolt was his fifth home run in nine games, setting a modern-day record for the franchise that started in Boston and moved to Milwaukee before heading south in 1966.
Riley's single five innings later was equally pivotal to keeping the Braves rolling.
He hit a game-tying home run in the eighth inning, then drove in the go-ahead run in the 13th with a two-out single off Reyes Moronta, lifting the Braves to a 5-4 victory over the San Francisco Giants on Thursday.
"That was a great at-bat," Braves manager Brian Snitker said. "It was a great approach by him. He's been very impressive so far."
Atlanta hit eight homers - three by Riley - as it won three of four games at San Francisco, the most the Braves have hit in one series at the Giants' waterfront ballpark. They hit seven in a four-game series at Oracle Park in 2012.
The 22-year-old Riley became the fastest Brave to reach five home runs during the live-ball era.
"That's cool," he said. "To be able to do that is an honor. The last hit was even more special to me because it put the team ahead and got the job done."
Riley already had one hit before his two-run homer off Tony Watson with two outs in the eighth.
The Braves had only one baserunner over the next four innings before Dansby Swanson singled against Moronta (1-4) leading off the 13th. After Freddie Freeman flew out, Swanson stole second base. One out later, Riley lashed a single to right field and Swanson scored easily.
Riley and Ozzie Albies both had three hits for Atlanta, and Tyler Flowers homered for the Braves, who have won 10 of their past 13 games.
"Mentally he's in a good spot," Flowers said of Riley. "He's into his approach, he trusts himself. He doesn't panic on pitches in, out, up, down. He doesn't let that dictate what he's trying to do."
Two days after his fourth blown save of the season, Atlanta's Luke Jackson (3-1) retired six batters to earn the win. The Braves closer called Riley "a human cheat code" and said the youngster has made a quick impression on his teammates.
"You expect it now," Jackson said.
San Francisco got the tying run on base with one out in the bottom of the 13th, but Jackson struck out Mac Williamson before third baseman Josh Donaldson made a barehanded grab on Donovan Solano's short chopper, throwing to first for the final out.
The Giants' Tyler Austin hit the first pinch-hit home run of his MLB career, and teammate Brandon Belt scored on a wild pitch.
"We let this one get away," Giants manager Bruce Bochy said. "We just couldn't get the bats going later on against their bullpen."
Atlanta's win overshadowed a strong outing by Giants starter Madison Bumgarner. The big left-hander allowed two runs on six hits, walked two batters and left with a 4-2 lead. Bumgarner has a 2.12 ERA in nine games against the Braves since his last loss to them on Aug. 25, 2012.
Braves starter Kevin Gausman, who has one win in his past nine starts, allowed three runs in six innings.