#Amed Rosario’s walk-off homer leads Mets to sweep of Yankees

After Dom Smith propelled the Mets to victory in the first game on Friday, Amed Rosario finished the Mets’ perfect day against the reeling Yankees in the nightcap, as the Mets swept a pair of seven-inning games in the first Subway Series doubleheader of the weekend.

Smith hit a go-ahead homer in the sixth inning in the Mets’ 6-4 comeback victory in Game 1 and Rosario finished the second game with a two-run pinch-hit homer off Aroldis Chapman to beat the Yankees, 4-3.

The loss was the Yankees’ seventh straight, their longest such streak since 2017.

Jeff McNeil started the Mets’ seventh-inning rally in the second game with a walk. Pinch-runner Billy Hamilton was caught off first, but still stole second. Rosario followed with a walk-off, two-run homer to left to end it.

A day after the Mets and much of the rest of Major League Baseball opted not to play in an attempt to protest racial injustice, there was no talk of another day of postponements.

Instead, the Mets and Yankees took the field in The Bronx on Jackie Robinson Day and Smith delivered a go-ahead solo homer in the sixth inning of the first game off Chad Green.

In the second game, the Yankees scored three runs off David Peterson in the top of the third (since the Mets were serving as the home team in the makeup of last week’s postponement at Citi Field), sparked by a leadoff walk from Jordy Mercer. Erik Kratz and Aaron Hicks delivered RBI singles and Gary Sanchez drew a bases-loaded walk. Mike Tauchman grounded into an inning-ending double play.

The Yankees loaded the bases again in the fifth, but Miguel Andujar grounded out.

The Mets cut their deficit to a run with a Brandon Nimmo RBI double off Nick Nelson in the fifth.

And Chapman blew it in the seventh, much like Green did in the opener.

This was Green’s second straight poor outing, as he also allowed a homer to Freddie Freeman in Atlanta on Wednesday to blow that game.

The Mets’ Game 1 rally started with singles by J.D. Davis and Michael Conforto off left-hander Jordan Montgomery.

At just 68 pitches and holding a three-run lead, Montgomery was removed for Green to face Pete Alonso, mired in an 0-for-13 skid.

Alonso worked a full count and drilled a game-tying, three-run shot to center.

After Green got Robinson Cano and Wilson Ramos, Smith came to the plate and hit one out to right-center to give the Mets a 5-4 lead.

Jake Marisnick followed with another homer to make it 6-4.

Like Masahiro Tanaka in Wednesday’s loss to the Braves, Montgomery had a low pitch count when he was pulled, but Boone defended the move.

“We like Green in just about any situation,’’ Boone said. “He’s had a couple bumps here. … It wasn’t a great day.”

It was for Smith, who has emerged as a leader for the Mets.

“It’s amazing, the way he carries himself off the field,’’ right-hander Michael Wacha said. “For him to come through there was unbelievable.”

The Yankees got two runners on with two outs in the sixth against Dellin Betances, as the ex-Yankee hit Clint Frazier and walked Brett Gardner. But Sanchez popped to center, as his struggles continued.

Edwin Diaz closed it out in the seventh for the save.

“We’ve just got to find a way,’’ Boone said of his injury-decimated team that, in the opener, had Gardner hitting third, Estevan Florial starting in center field despite never having played a game above Class-A Tampa and now Gio Urshela nursing an elbow injury. “We haven’t been able to finish off the win.”