Jacob deGrom’s bat went cold Wednesday night, so the Mets lost.

Not that his teammates are lighting up the scoreboard for other members of this rotation, but deGrom’s uncanny misfortune in receiving run support has become legendary. At least his own hitting — six hits and two RBIs in four starts this season — had helped disguise some of those offensive shortcomings.

On this night, the Mets ace allowed one measly run and then matched the rest of his lineup in producing nothing at the plate in a 1-0 loss to the Red Sox at Citi Field.

The loss was the Mets’ second straight and third in four games. In all those losses, they scored one run or fewer.

“At the end of the day there is no excuse,” James McCann said of the Mets’ offensive woes. “We have to find a way. Especially in a game like tonight where between Jake and the rest of the staff we held them to one run. You have got to find a way to win those games. I don’t care how any one individual is feeling in the box, we have got to find a way to string hits together and I think anybody in that clubhouse is going to say the same thing.”

Francisco Lindor and Michael Conforto were among the players who heard boos on a night when the Mets had only two hits (singles by Pete Alonso and Jeff McNeil) and finished 0-for-4 with runners in scoring position.

“The approach was just off,” manager Luis Rojas said. “Late on fastballs, chasing breaking balls, taking pitches in the zone. It was just off. We were off — and it was consistent.”

Over six innings (93 pitches) deGrom allowed one earned run on three hits with nine strikeouts and one walk. That followed a 15-strikeout shutout of the Nationals last Friday that might have been the defining regular-season performance of deGrom’s career.

DeGrom’s only blemish Wednesday occurred in the second inning, when Christian Vazquez delivered an RBI double that put the Mets in a 1-0 hole. The earned run was only the second allowed by deGrom this season, matching the number of runs he has driven in at the plate. Xander Bogaerts doubled leading off the inning to begin the rally.

“There in the second [inning] I didn’t make pitches when I needed to,” deGrom said. “I left a ball over the middle and Bogaerts hit the double and I just wasn’t able to execute on those next few batters to get us out of that spot.

“I think I am just disappointed because of how good I felt mechanically last time out there and just wasn’t able to repeat that. … I just felt like I should have been able to make pitches in that second.”

Alex Verdugo walked in the sixth, snapping a streak off 66 straight batters faced by deGrom without a walk allowed. DeGrom rebounded to strike out J.D. Martinez before retiring Bogaerts to end the inning.

Boston starter Nick Pivetta frustrated the Mets over five shutout innings, allowing one hit and three walks with seven strikeouts. It was a third start this season in which the right-hander pitched at least five innings and allowed two runs or fewer.

Lindor, who was booed a night earlier, received another smattering of jeers after striking out to end the third inning. That came after Lindor fouled a pitch off plate umpire Jerry Layne’s mask, forcing the ump to leave the game. Lindor struck out again to begin the sixth and heard additional boos.

“Everybody is out there giving 100 percent, nobody wants to get out,” deGrom said. “We are out there competing and that’s all we can do.”

Brandon Nimmo and Lindor walked in succession to begin the game for the Mets, but Alonso struck out for the fifth straight time over two games before Conforto and J.D. Davis were retired.

McNeil singled in the second, but was erased as part of McCann’s double play. McCann walked in the fifth, but neither deGrom nor Nimmo could deliver against Pivetta.

Aaron Loup, Trevor May and Edwin Diaz combined on three innings of scoreless relief. May was particularly strong, striking out the side in the eighth.