A month after trading for Marcus Stroman before the July 31 trade deadline, Mets GM Brodie Van Wagenen has no regrets and remains confident the right-hander is a good fit, despite some rough numbers.

“I’m not concerned at all with his start,’’ Van Wagenen told The Post Wednesday, a night after Stroman allowed four runs — and two more homers — in six innings in a loss to the Cubs at Citi Field.

“I felt he threw the ball well [Tuesday] night,’’ Van Wagenen said before the Mets’ 10-7 loss to the Cubs on Wednesday. “He threw four dominant innings and then there were some difficult defensive plays behind him and then a home run.”

The two homers helped lead to the Mets’ fourth straight loss — although as Van Wagenen pointed out, it was the first time the Mets lost in Stroman’s five starts since coming over from Toronto.

“His execution will continue to get better as he works with our catchers,’’ Van Wagenen said. “I think his ability to move the ball around the strike zone is still a strength of his. We have every bit of confidence he will continue to improve with us. At this point, we’re 4-1 in his five starts. If we can get that result, I’d be very pleased.”

But there are some discouraging aspects to Stroman’s first four-plus weeks in Queens: a 4.91 ERA, an increase in base runners and an elevated walk rate. And he’s giving up homers nearly twice as much as he has previously in his career.

“We know he’s a big-game pitcher and he’s not afraid of any situation,’’ Van Wagenen said. “That’s still the case.’’

Mickey Callaway agreed with Van Wagenen about Stroman’s mindset.

“Marcus Stroman isn’t gonna be down,’’ Callaway said. “He understands he works really hard and that’s what gives him confidence. I don’t think results from every game is gonna get him too down.”

And Callaway liked what he saw from Stroman in his four scoreless innings to start the game.

“I was encouraged by the first few innings,’’ the manager said. “He started doing the things it takes — that he’s done in the past — to have a lot of success.”

Jed Lowrie’s rehab assignment was moved to Triple-A Syracuse on Wednesday. Lowrie, out all year with a variety of leg injuries, played five games with Class-A St. Lucie and started at second base and went 1-for-3 hitting in five innings.

Brandon Nimmo (neck) played in left and center in seven innings for Syracuse. He went 2-for-4 with a homer in his eighth rehab game and he could be back this weekend.

After throwing off a mound on Tuesday and reporting no issues relating to the tight trap muscle that knocked him out of Saturday’s game, Edwin Diaz made his return on Wednesday and struck out the side in order in the eighth.

Wilson Ramos extended his hitting streak to 21 games with a single in the fourth. He went 2-for-4.

Jeff McNeil (3-for-5, two RBIs) was back in the leadoff spot with Amed Rosario (2-for-5) bumped down to seventh against right-hander Kyle Hendricks, as the Mets search for runs.

Todd Frazier started the game on the bench, but had a pinch-hit double and added a single.

“It’s gonna be a fluid thing,’’ Callaway said of the lineup. “We might revert [Thursday] when we face [left-hander Jon] Lester.”

Scouting director Jim D’Aloia won’t have his contract renewed after the season, a source confirmed.

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