Pinch-hitter Franmil Reyes connected for a go-ahead, two-run homer in the seventh inning, and the San Diego Padres rallied from five down against Madison Bumgarner to beat the San Francisco Giants 6-5 on Monday night.

Fernando Tatis Jr. also hit a two-run homer and Wil Myers had a solo shot for the Padres.

Kevin Pillar hit his first career grand slam in the fourth but Bumgarner and the Giants’ bullpen couldn’t hold a 5-0 lead.

San Diego Padres shortstop Fernando Tatis Jr. dives unsuccessfully for a base hit by San Francisco Giants' San Francisco Giants' Tyler Austin (19) during the fourth inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)
San Diego Padres shortstop Fernando Tatis Jr. dives unsuccessfully for a base hit by San Francisco Giants’ San Francisco Giants’ Tyler Austin (19) during the fourth inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)

San Francisco’s Gerardo Parra went down in the seventh after being hit in the face by a 93 mph fastball from Brad Wieck. Parra immediately grabbed at the right side of his face and went face down in the dirt near home plate as manager Bruce Bochy and a pair of athletic trainers scurried out. Parra was eventually able to get up to one knee and walked off holding a towel to his face.

Bumgarner didn’t allow a hit until Tatis’ homer in the fifth. Tatis was twice hit by pitches from Bumgarner, including to start the seventh three batters before the decisive home run.

When Bumgarner struck out Luis Urias to end the third, it gave the lefty 1,607 career Ks to pass Hall of Famer Gaylord Perry for seventh on the franchise list and also fourth on the San Francisco list.

San Francisco Giants' Gerardo Parra falls to the ground after being hit by a pitch against the San Diego Padres during the seventh inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)
San Francisco Giants’ Gerardo Parra falls to the ground after being hit by a pitch against the San Diego Padres during the seventh inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)

Brandon Crawford put the Giants ahead with an RBI single in the fourth and Pillar connected for his first home run of the year three batters later after Eric Lauer (2-1) intentionally walked Yangervis Solarte.

The grand slam was the first for the Giants in two years, since Brandon Belt connected against San Diego on April 7, 2017.

Bumgarner left to a standing ovation when he gave way to Reyes Moronta (0-2) with two runners on in the seventh. Manuel Margot immediately delivered an RBI groundout, and Reyes’ first home run of the year was a drive that landed on the concourse above the left field bleachers.

San Francisco Giants' Kevin Pillar hits a grand slam against the San Diego Padres during the fourth inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)
San Francisco Giants’ Kevin Pillar hits a grand slam against the San Diego Padres during the fourth inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)

Lauer struck out eight over six innings with three walks, allowing four hits and five runs. Kirby Yates finished for his sixth save, walking Joe Panik with one out after left fielder Myers dropped a foul ball in the Giants’ bullpen.

Manny Machado went 0 for 4 and was booed each time he came to the plate as the NL West rivals met for their second series already after the Padres took three of four to open the season at Petco Park.

Giants newcomer Tyler Austin started at first base with Belt moving to left field after Austin was acquired in a trade from the Minnesota Twins. Belt moved to first in the sixth as Parra entered in left.

San Francisco Giants pitcher Madison Bumgarner throws against the San Diego Padres during the first inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)
San Francisco Giants pitcher Madison Bumgarner throws against the San Diego Padres during the first inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)

Austin singled to begin the fourth for his first hit with the Giants after arriving on a delayed flight from Atlanta. He had never been to San Francisco’s waterfront ballpark.

“I’ve seen it on TV, that’s it,” Austin said, noting he walked the warning track to the dugout.

Pregame rain didn’t keep the teams from taking batting practice on a cool, blustery Bay Area spring night during which a mist hovered over the diamond.

San Diego Padres pitcher Eric Lauer throws against the San Francisco Giants during the first inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)
San Diego Padres pitcher Eric Lauer throws against the San Francisco Giants during the first inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)

EARLY START

The Giants played their first regular-season game with the new 6:45 p.m. PDT start time, a half-hour earlier than in the past. Friday night games will still begin with first pitch at 7:15 p.m. PDT.

TRAINER’S ROOM

San Francisco Giants' Tyler Austin, left, runs toward home to score against the San Diego Padres during the fourth inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)
San Francisco Giants’ Tyler Austin, left, runs toward home to score against the San Diego Padres during the fourth inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)

Padres: Placed OF Franchy Cordero and LHP Aaron Loup on the 10-day injured list, each with left elbow strains. Cordero is in San Diego and will undergo further tests on his troublesome elbow. He had bone spurs removed last year. Manager Andy Green said Loup felt discomfort throwing a pitch to Paul Goldschmidt on Sunday in St. Louis. … San Diego recalled Urias and Wieck from Triple-A El Paso. Urias started at second base and led off to open the three-game series.

UP NEXT

Padres: LHP Joey Lucchesi (2-0, 0.00 ERA) has thrown 10 1/3 scoreless innings with 13 strikeouts and three walks to begin the year.

San Francisco Giants third baseman Evan Longoria fields a ground-out by San Diego Padres' Hunter Renfroe during the fourth inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)
San Francisco Giants third baseman Evan Longoria fields a ground-out by San Diego Padres’ Hunter Renfroe during the fourth inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)

Giants: LHP Derek Holland (0-1, 5.00) took the loss in the second game of the season at San Diego, allowing three runs and four hits over four innings.

___

San Francisco Giants manager Bruce Bochy, left, and hitting coach Alonzo Powell react toward an umpire after Brandon Belt struck out against the San Diego Padres during the fifth inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)
San Francisco Giants manager Bruce Bochy, left, and hitting coach Alonzo Powell react toward an umpire after Brandon Belt struck out against the San Diego Padres during the fifth inning of a baseball game in San Francisco, Monday, April 8, 2019. (AP Photo/Jeff Chiu)

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