OAKLAND — The A’s entered the ninth inning Saturday afternoon with a one-run lead over the Giants but left with a 6-5 loss after closer Lou Trivino gave up a two-run homer to pinch hitter LaMonte Wade Jr. in the top of the inning.

San Francisco Giants’ LaMonte Wade Jr. (31) connects for a two-run home run in the ninth inning of their MLB game at the Coliseum in Oakland, Calif., on Saturday, Aug. 21, 2021. (Jose Carlos Fajardo/Bay Area News Group) 

The home run was the first Trivino has allowed since June 30 and his third blown save this season, his first since May 31.

“Not all losses are equal,” Trivino said. “We needed to win that game. It sucks. Quite frankly, it sucks. We had the lead most of the game and I thought we were on a roll.”

The loss also served as a reminder of an added challenge the A’s will face without Chris Bassitt, the AL leader in innings pitched, after he was struck in the face with a line drive this week.

Starter Sean Manaea made it through just 4 2/3 innings on Saturday after James Kaprielian went five on Friday, and the bullpen started to show some cracks. Andrew Chafin, pitching for the third time in four days, entered the eighth inning with a three-run lead and gave up back-to-back home runs to Brandon Belt and Darin Ruf, cutting the A’s lead to one run.

Those were the first earned runs Chafin allowed in 11 appearances since the A’s acquired him at the deadline from the Chicago Cubs. He’d given up just one other home run this season back in April. Belt was 0-for-16 in his career against Chafin.

“Few balls up. Belt is a good low-ball hitter and it’s a good match-up, but he got a ball he could handle,” manager Bob Melvin said. “It’s a good home run hitting team. That’s how they scored everything today. And when we made mistakes that’s how they took advantage.”

Trivino made his third straight appearance on Saturday, his pitches looking as effective as usual except for one inside fastball to Wade, who crushed it 105 miles per hour over the right-field wall. Trivino said he wanted to keep that pitch a bit higher.

“You don’t want to throw a lefty down and in. They tend to hit that well,” Trivino said. “But apparently, they hit 94 up and in pretty well, too. So it is what it is.”

San Francisco Giants’ Tommy La Stella (18) forces out Oakland Athletics’ Sean Murphy (12) at second base for the double play in the sixth inning of their MLB game at the Coliseum in Oakland, Calif., on Saturday, Aug. 21, 2021. (Jose Carlos Fajardo/Bay Area News Group) 

Jake Diekman barely escaped trouble in the eighth inning, giving up two weak-contact singles back-to-back. But the Giants helped him out a bit when Curt Casali popped out on a bunt attempt, Diekman caught Crawford stealing and then struck out Austin Slater to strand the runners.

How the A’s took an early lead

Seth Brown, optioned to Triple-A Friday with Chad Pinder’s return to the roster, was halfway to Las Vegas in his car when he got a call from the A’s head honchos. Stephen Piscotty had been placed on the 10-day IL with a right wrist sprain on Saturday morning and Brown would need to turn around and drive back to Oakland.

Hours later, Brown hit a two-run single to spark a three-run inning that started with a throwing error by Giants third baseman Wilmer Flores, putting Mark Canha on third in the first inning.

Oakland Athletics’ Matt Olson (28) is safe at home plate as San Francisco Giants’ Curt Casali (2) is late on the tag in the third inning of their MLB game at the Coliseum in Oakland, Calif., on Saturday, Aug. 21, 2021. Olson scored on a hit by Oakland Athletics’ Josh Harrison (1). 

Starling Marte doubled to the gap in left-center field to score Canha. When Josh Harrison was hit by a pitch, he and Marte combined for a double steal. It was Marte’s 15th stolen base in just 20 games with the A’s. Brown scored them with an opposite-field bloop.

Oakland added on in the third inning against Giants starter Kevin Gausman. Matt Olson worked a nine-pitch at-bat for a single and Harrison notched his third hit of the series, a double to score Olson from first base. The A’s had an opportunity to break it open in the fourth inning, loading the bases on back-to-back hits from Sean Murphy and Tony Kemp, plus a Canha walk. But they could only score one on Gausman’s wild pitch when Marte struck out and Olson flied out against reliever Jarlín García.

A San Francisco Giants fan cheers for his team while surrounded by Oakland Athletics fans in left field during their MLB game at the Coliseum in Oakland, Calif., on Saturday, Aug. 21, 2021. The San Francisco Giants defeated the Oakland Athletics 6-5. (Jose Carlos Fajardo/Bay Area News Group) 

The A’s had a good read on Gausman’s fastball-splitter combination. But the Giants bullpen held the A’s scoreless after Gausman’s departure two outs into the fourth inning.

“We were in a position to win the game,” Melvin said. “Offensively we did OK today. Certainly more early than late. This is a game we usually nail down.”

Sean Manaea’s rough stretch continues

Manaea didn’t have optimal control of his pitches, but he held the Giants to just a Kris Bryant two-run home run before his departure with the bases loaded and two outs in the fifth inning. Yusmeiro Petit cleaned up the mess, getting Flores to line out softly to Kemp to strand the runners.

Strong through most of this season, Manaea hasn’t been able to escape the fifth inning over his last four starts, accruing a 9.77 ERA over that span.

“Last three starts were horrible, so to have an outing like that to grind through it and do something like that was huge,” Manaea said. At the end of the day, it was just OK.”

Manaea said he took a step in the right direction with his slider and changeup and upped his fastball velocity a bit — he was hitting 94 mph more consistently — compared to his previous three starts.