OAKLAND -- The Giants’ biggest inning of the year began innocuously.

With the Giants trailing by two, Stephen Vogt led off the eighth inning by lifting a flyout to center field. Eight batters, six hits, one walk and one wild pitch later, Vogt stepped up to the plate for his second at-bat of the inning. He was determined to keep the Giants’ decisive rally going.

“Nobody wants to make two outs in the inning,” Vogt said. “You want to add on.”

Vogt (wearing “I Believe” on his jersey for Players’ Weekend) delivered, launching a three-run shot to the opposite field to cap an eight-run eighth that propelled the Giants to a 10-5 comeback win over the A’s in Saturday night’s Bay Bridge Series opener at the Coliseum and halted their four-game losing streak.

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“What a comeback,” manager Bruce Bochy said. “Eight in the eighth there. Everybody did something that inning.”

Seven consecutive batters reached base with one out in the eighth to spur the Giants’ most productive inning since Aug. 28, 2016. A trio of singles from Buster Posey, Alex Dickerson and Evan Longoria brought San Francisco within one before Dickerson scored the tying run on a wild pitch from A.J. Puk. After a walk from pinch-hitter Austin Slater, Kevin Pillar sliced a two-run double down the right-field line, putting the Giants ahead, 6-4.

Brandon Crawford added an RBI single, and Vogt followed by driving a 3-1 fastball from Ryan Buchter to the left-field bleachers for his eighth home run of the season. Vogt, a former A’s catcher who received a rousing ovation from fans in his return to the Coliseum on Saturday, is 10-for-31 (.323) over his last 10 games to lift his batting average to .280 on the season.

“It was really special for me with the fans,” said Vogt, who earned two All-Star nods over his five-year tenure with Oakland. “I was very moved by them cheering. The way that I was received the first time back, it really meant a lot to me. Obviously, this is a special place for me and for my family. To come back and have the fans say ‘Thank you’ or ‘Hi,’ it was a very neat moment.”

Bochy said he isn’t surprised that A’s fans continue to harbor warm feelings for Vogt.

“They love him, as they should,” Bochy said. “We do. He’s such a great teammate and plays the game right. He’s done some really good things here. He’s done some great things for us, too. I’m not surprised to see the hand he got.”

Vogt missed the entire 2018 season while rehabbing from shoulder surgery, but he signed a Minor League deal with the Giants in February and has now emerged as a key veteran contributor, forming an effective catching tandem with starter Buster Posey. After serving as the club’s designated hitter on Saturday, Vogt is slated to catch pitching prospect Logan Webb in Sunday’s series finale.

“It’s a nice combo, he and Buster,” Bochy said. “They complement each other so well that it’s enabled me to rest Buster more this year.”