After scoring just three runs in a frustrating four-game series at Nationals Park over the weekend, the Giants faced lingering questions about their lineup and whether it was missing too many key contributors to keep the club in first place.

Three days later, Giants hitters couldn’t be happier to be back at Oracle Park. Seriously.

A ballpark that hasn’t exactly been a favorite of major league hitters isn’t fazing the 2021 Giants, who crushed five home runs in a 13-7 victory over the Arizona Diamondbacks on Wednesday.

Buster Posey, Steven Duggar, LaMonte Wade Jr., Wilmer Flores and Brandon Belt all circled the bases against a D’backs team that tied a major league record with its 22nd consecutive road loss. The combination of facing an overmatched Arizona pitching staff and playing on another warm night along the waterfront certainly helped the Giants (43-25) as the club finished with 12-plus hits for the third consecutive night.

The Giants’ five home runs at Oracle Park were their most at home since Jose Cruz Jr. and Rich Aurilia each hit a pair of homers while Edgardo Alfonzo added on another in an April 7, 2003 win over the San Diego Padres. All five home runs hit by the Giants Wednesday came in the first five innings, which gave the team several opportunities to threaten the club’s record of six at China Basin, set on September 5, 2000 in the inaugural season of the park.

San Francisco’s offense built the team a 10-run lead after five innings, but a disastrous sixth inning for lefty Conner Menez allowed the Diamondbacks to keep some hope alive a night after the Giants engineered a seven-run comeback. Menez entered Wednesday’s game with a 0.00 ERA but gave up a leadoff home run to Asdrúbal Cabrera before making a two-out throwing error extended the inning and led to four more D’backs runs.

Fortunately for Gabe Kapler’s club, the lead proved insurmountable as lefty José Álvarez entered and provided two stabilizing innings of scoreless ball.

“He’s really starting to come around and be the pitcher we expected him to be when we signed him this offseason,” Kapler said. “I have some familiarity with him from my time in Philadelphia, he was attacking the strike zone consistently with that 91-92.”

Posey’s 12th home run of the season immediately erased a 2-0 first-inning deficit as the Giants took a 3-2 lead before Arizona starter Merrill Kelly recorded an out. The homer matched Posey’s total from 2017, when he was an All-Star and won the National League Silver Slugger at the catcher position.

“It’s amazing,” Flores said of Posey’s season. “This is my first year playing with him and watching him every day, how he goes about his business. We all know he can hit and what he can do out there, but for me, watching him in the clubhouse and how he approaches things, it’s even more amazing.”

The Giants’ second home run of the night came in the fourth inning from Duggar, who homered in back-to-back games for the second time in his career and extended his single-season career-high in home runs to six. Two batters later, another left-handed hitting outfielder who had a limited track record of success entering the 2021 season extended his career-high to four.

With a solo shot into the left field bleachers, Wade continued to make a compelling case case that he should remain a fixture in the Giants’ lineup even when Alex Dickerson (back strain) and Darin Ruf (hamstring strain) return from the injured list.

“I think (Duggar and Wade) are seeing balls up in the strike zone and getting pitches they can handle,” Kapler said. “They’re attacking those pitches, they’re elevating those itches. Duggar since spring training has used the entire field and demonstrated he has power to all parts of the ballpark. LaMonte continues to have high quality at-bats and go after pitches he can drive.”

The Giants didn’t have to wait long for their next home runs as Flores launched a pinch-hit, two-run blast halfway up the left field bleachers before Belt sent his ninth home run of the season, a three-run shot, into the arcade seats above the brick wall in right field.

Flores’ homer was the Giants’ major league-best eighth pinch-hit home run of the season while Belt’s marked his fourth extra-base hit in his last six at-bats.

The Giants’ 99 home runs rank third in the majors and lead all National League teams.