The catcher had a two-run double that capped four-run comeback with two out in the seventh that made it 6-all.
“It was a crazy game,” Stallings said. “I think that was more pumped up than I usually get, more emotional than I usually get. It was just that kind of game.”
Adam Frazier singled to lead off the Pittsburgh ninth and was thrown out at the plate when he tried to score on Bryan Reynolds’ one-out double. Reynolds took third on the play, and trotted home when Stallings sent a drive into the left-field bleachers off Jake McGee (1-1).
McGee gave up a game-tying single to Reynolds that sent a 3-2 loss into extras Friday.
“I have confidence in everybody in our ’pen,” Giants manager Gabe Kapler said. “That doesn’t mean it’s not a real challenge. … In these situations, we’re trying to win baseball games. Sometimes you have to call on your best to try to win them.”
Stallings hit a wakoff solo shot in a 3-2 win against the Chicago Cubs in an empty PNC Park on Sept. 22 last season. On Saturday, he did it in front of a season-high Pirates crowd of 7,833.
“I guess I didn’t think about that, but maybe that added to the emotion,” Stallings said. “Hard to say, but I was definitely more pumped up this time. So maybe that went into it.”
Kevin Newman hit an RBI single and another run scored on a wild pitch as the Pirates rallied in the seventh.
Pirates closer Richard Rodriguez (2-0) allowed a two-out single to Brandon Crawford in the ninth before getting Mauricio Dubon to pop out.
Pittsburgh has won four of seven games since losing eight of its previous nine. The Pirates beat the NL West-leading Giants on Friday night on a walkoff sacrifice by Gregory Polanco in the 11th inning.
Pirates manager Derek Shelton was ejected for the first time this season while arguing balls and strikes in the eighth.
“Everything is delayed, so the security guys had it first,” Shelton said about watching the walkoff from the clubhouse. “So it was exciting. We don’t have the actual game inside. We have a high home, we have a delay, so the security guys kind of let me know. But credit to our guys. They continued to fight and battle, and it was awesome.”
Darin Ruf and Brandon Crawford hit home runs off Tyler Anderson to put the Giants ahead 3-0 in the first. Mike Tauchman hit a two-run homer off reliever Kyle Keller for a 6-2 lead in the sixth.
“Obviously, losing some close ones the last few days can get you feeling down,” Ruf said. “But this team has enough veteran leadership to rebound quickly. Looking forward to getting out there tomorrow and hopefully getting some runs on the board, and making some good plays defensively.”
Giants starter Johnny Cueto went 4 1/3 innings, allowing two runs and eight hits.
The Pirates optioned RHP Miguel Yajure to Triple-A Indianapolis and recalled Keller from Indianapolis. Yajure one-hit the Giants through five shutout innings in his start Friday, his second in the majors.
Giants: OF Mike Yastrzemski did not play because of side soreness after colliding with the right-field wall Friday. He is not expected to be out long-term, Kapler said.
Pirates: 1B Colin Moran (groin) fielded ground balls hit directly at him for the first time Saturday, Shelton said. He was placed on the 10-day injured list Sunday.
Giants LHP Alex Wood (4-0, 1.80 ERA) will look to keep cruising as he faces Pirates RHP Mitch Keller (2-4, 7.81) on Sunday. Wood hasn’t allowed more than two runs in five starts this season. Keller lasted 3 1/3 after getting tagged for seven runs his last time out against the Cincinnati Reds on Monday.
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