San Francisco Giants' Matt Chapman, left, celebrates with LaMonte Wade...

San Francisco Giants' Matt Chapman, left, celebrates with LaMonte Wade Jr. after hitting a grand slam against the Cincinnati Reds during the first inning of a baseball game Saturday, May 11, 2024, in San Francisco. Credit: AP/Godofredo A. Vásquez

SAN FRANCISCO — Matt Chapman hit a grand slam in the first inning to lead the struggling San Francisco Giants to a 5-1 victory over the Cincinnati Reds on Saturday.

The Giants had lost eight of 11 games coming into the contest and were averaging less than three runs over their last 15 before Chapman provided more than that with one big swing in the first against Nick Lodolo (3-2).

Chapman came to the plate with two outs in and sent a drive over the bullpen beyond the fence in left-center to give San Francisco a 4-0 lead.

Mason Black made the lead stand up by allowing only one run in 4 1/3 innings in his home debut, giving up a solo homer to Elly De La Cruz in the fourth.

The bullpen did the rest, sending the Reds to their ninth loss in 10 games.

Taylor Rogers (1-1) replaced Black with two runners on in the fifth. He got out of the jam by striking out pinch-hitter Stuart Fairchild with the bases loaded to earn the win.

Black was helped by outfielder Heliot Ramos, who threw out two runners from right field trying to stretch hits into doubles and then made a diving catch in left field in the fifth inning.

San Francisco Giants' Matt Chapman runs the bases on a...

San Francisco Giants' Matt Chapman runs the bases on a grand slam against the Cincinnati Reds during the first inning of a baseball game Saturday, May 11, 2024, in San Francisco. Credit: AP/Godofredo A. Vásquez

Ramos threw out Will Benson in the second and Jake Fraley in the fourth and then robbed Benson of a hit after moving spots in the fifth inning. Mike Yastrzemski replaced Ramos in right field and threw Jeimer Candelario out trying to stretch a hit into a double to end sixth.

TRAINER’S ROOM

Reds: LHP Alex Young (back) retired all three batters on a rehab assignment at Triple-A Louisville on Friday and is expected to pitch again in the minors Sunday.

Giants: LF Michael Conforto left after hitting a single in the fourth inning with an apparent left leg injury. ... CF Austin Slater was placed on the seven-day concussion list after crashing into the wall Friday night. Manager Bob Melvin said Slater was reporting some “fogginess” the morning after. ... C Patrick Bailey was reinstated from the concussion list and started. ... Utilityman Brett Wisely was recalled from Triple-A Sacramento and C Jackson Reetz was optioned back to the River Cats.

San Francisco Giants pitcher Mason Black throws to a Cincinnati...

San Francisco Giants pitcher Mason Black throws to a Cincinnati Reds batter during the first inning of a baseball game Saturday, May 11, 2024, in San Francisco. Credit: AP/Godofredo A. Vásquez

UP NEXT

Cincinnati's Frankie Montas (2-3, 3.55) is set to take on Kyle Harrison (3-1, 3.20) in the series finale Sunday.

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