It’s been 125 years since the Dodgers had such a bad shutout loss at home.

Their rough month of June reached a nadir on Saturday with a 15-0 loss to the Giants at Dodger Stadium, matching their worst home shutout loss ever.

The Dodgers last lost 15-0 at home in 1898, when they were known as the Brooklyn Bridegrooms and fell to the Pittsburgh Pirates.

Saturday’s loss dropped the Dodgers (39-32) to 5-9 this month, and they’re four games behind the NL West-leading Diamondbacks.

“There’s things that we have to do better when things aren’t going well,” Dodgers manager Dave Roberts said after the defeat, according to the Los Angeles Times. “Little things, the execution parts of things.”

Rookie right-hander Bobby Miller had impressed over his first four MLB starts, allowing just two runs 23 innings, but he was hammered for seven runs on seven hits and three walks over 5 ⅔ innings on Saturday.

The game was tied 0-0 entering the fifth, when Miller surrendered four runs — three of which came on a LaMonte Wade Jr. home run — before being pulled in the sixth, when ex-Met J.D. Davis hit a grand slam.

“I think that’s probably the first time where there was a little kind of adversity in the sense of, something didn’t happen the way we’d expect it to happen,” Roberts told reporters. “I thought he showed a little bit of frustration. But things like that are gonna happen.”

The Dodgers’ rough run has coincided with a surge from the Giants, who have won six straight and are 10-4 this month.

The Giants (38-32) can pass the Dodgers in the standings if they pull off the sweep on Sunday.

“It’s been hard, obviously, to build any kind of momentum,” Roberts said of his Dodgers. “It doesn’t feel good to lose, certainly over a stretch like this. We just have to focus on playing good baseball. If we do that, it will change.”