Giants swept by Diamondbacks, fall 10 games below .500 for first time since 2019

Justice delos Santos, The Mercury News on May 20, 2026

Published in Baseball

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PHOENIX — For the first time since Buster Posey’s playing days, the San Francisco Giants have fallen 10 games below .500.

The Giants unceremoniously concluded their three-city trip by being swept by the Arizona Diamondbacks on Wednesday afternoon with a 6-3 loss. With a 20-30 record, the team is 10 games below .500 for the first time since July 1, 2019.

“Today’s about today, but a little bit of it is from yesterday,” said manager Tony Vitello, referring to Tuesday’s walk-off loss. “You can’t say ifs and buts, but if you win that game (on Tuesday), even with a disappointing outcome today, you’re .500 on a really difficult road trip.”

San Francisco finishes its 10-game circuit away from the Bay with a disappointing 4-6 record. The Giants split their four-game series against the Los Angeles Dodgers, winning the first two games but dropping the latter two. They responded by taking two of three against the Athletics, needing just one win against the Diamondbacks to at least finish their road trip with a .500 record.

Instead, the Giants leave the desert empty-handed. On Monday, they were blown out. On Tuesday, they blew a two-run lead as Ketel Marte hit a walk-off homer. And on Wednesday, the Diamondbacks finished the dusting.

“I think the effort’s been outstanding. Again, you catch a different break or have a different conclusion in one game, I think everybody’s pretty satisfied with how things have gone since that point. Unfortunately, we just don’t come out of Arizona with a win,” he said.

Right-hander Tyler Mahle turned in another subpar start, allowing six earned runs (and one homer) over five innings.

Through 10 starts, Mahle owns a 6.10 ERA, the worst mark among any qualified pitcher in the majors. With Trevor McDonald pitching well (2.37 ERA) and Logan Webb nearing his return from right knee bursitis, the Giants will soon have to decide whether to keep Mahle in their rotation.

“I haven’t given us a chance to win every fifth day,” Mahle said. “That’s all I can focus on is what happens on my day, and that hasn’t been going well.”

Top prospect Bryce Eldridge, who sat on Tuesday after collecting two hits on Monday, was one of the few bright spots in Wednesday’s loss. Eldridge smashed an RBI double in the top of the second with an exit velocity of 113.4 mph, the hardest-hit ball by a Giant this season.

“He’s had the same comfort level from my vantage point since he’s been up with us, but encouraging for him to show how well he can strike the ball,” Vitello said.

Casey Schmitt, making his second career start in left field, hit his team-leading ninth home run of the season, a solo shot in the top of the first.

San Francisco and Arizona each put up three runs apiece through the first four innings. The Giants manufactured their offense on Schmitt’s solo homer (first inning), Eldridge’s RBI double (second inning) and Drew Gilbert’s RBI single.

As for the Diamondbacks, their first three runs all stemmed from Marte, who hit a walk-off homer on Tuesday. Marte hit a leadoff double in the first and scored on a sacrifice fly by Geraldo Perdomo, then cleared the fences for the second time in the last 24 hours with a two-run homer in the third.

The Diamondbacks took the lead for good in the bottom of the fifth by putting up a three-spot, the big blow being Perdomo’s two-run double. San Francisco didn’t have an offensive momentum after Gilbert’s single, failing to collect a single hit in the latter four innings.

Worth noting

Right fielder Jung Hoo Lee sat out a second straight game after leaving Monday’s game with back spasms. With an off day on Thursday, the Giants wanted to get Lee three consecutive off days ahead of their series against the Chicago White Sox.

Up next

Following an off day on Thursday, the Giants will begin a six-game homestand on Friday, beginning with three games against the Chicago White Sox. McDonald, Adrian Houser (a former White Sox) and Robbie Ray are slated to start against Chicago this series, in that order.

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