The Mets finally quieted Shohei Ohtani’s bat in his final New York appearance before free agency this winter, and two late rallies helped them avoid a weekend sweep by the Angels. 

David Peterson tossed seven innings of one-run ball in his longest start of the season, until Rafael Ortega’s bases-loaded single in the ninth sent the Mets to a 3-2 walk-off win Sunday at Citi Field to halt their four-game losing skid. 

“Pete’s very quietly been real competitive for us. That was the key to the game, his outing, regardless of everything else that could be talked about,” Buck Showalter said about Peterson afterward. “We needed a starter to get deep in the game and Pete dialed that up for us. 

“He had a lot better command, with a lot of ground balls. And he kept Ohtani from hurting us, and that’s quite a feat.” 

Despite a UCL tear in his right elbow that will prevent him from pitching again this season, Ohtani had been 3-for-5 (all extra-base hits) with five walks over the first two games of the series. But the two-way superstar went hitless on Sunday in four trips with two strikeouts. 

“Mix it up, move it around and try to keep him off balance,” Peterson said about facing Ohtani. “I was trying to see where I could pitch him and let the game dictate it and try to finish him and get him out of there. 

“I felt like I was really attacking the zone today.” 

Since returning to the starting rotation on Aug. 4, Peterson had totaled just 15 innings over four starts, with a high of 4 ²/₃ with four earned runs allowed in a 10-4 loss last week in Atlanta.

The lefty’s trouble lasting deep into games largely were due to control issues, with 13 walks over those 15 innings. 

Still, the Mets needed length from Peterson after Carlos Carrasco allowed five runs and recorded only five outs in Saturday’s 5-3 loss, potentially threatening his rotation spot, Showalter admitted. 

Peterson needed only 27 pitches to get through the first two innings, including retiring Ohtani on a liner to left followed by two strikeouts in the opening frame.

Peterson added another strikeout in the third and two more in the third, most notably a whiff of Ohtani with a 1-2 fastball with a runner on second to end the inning after the Mets’ starter had committed a throwing error on a pickoff attempt after Luis Rengifo had reached on an infield single. 

Angels starter Griffin Canning didn’t allow a hit until a one-out knock by Jeff McNeil in the fourth and another single by Daniel Vogelbach two batters later.

McNeil aggressively scored from second on Francisco Alvarez’s infield hit, when Rengifo couldn’t get to his feet in time after making a diving stab behind second base. 

Peterson, who reduced his ERA from 5.59 to 5.23, nursed the 1-0 lead into the seventh. 

But the Angels loaded the bases with one out on two singles sandwiched around a walk.

They evened the score on an infield out after Alonso dove to his left to snag Chad Wallach’s hard grounder, but Peterson completed the seventh for the first time this season and kept the tie intact. 

“I would say in-game that’s one of the best [games] that I’ve felt this year. It felt good to get deep in the game again,” Peterson said. 

“I really liked how he finished the seventh, because things could have gotten away from him,” Showalter added. “But he’s not peeking in the dugout for any help:” 

The lefty struck out eight and walked three over seven innings (104 pitches), but Drew Smith promptly was tagged for a leadoff homer to right-center by Rengifo in the eighth for a 2-1 Angels lead. 

Pete Alonso tied it again with an RBI double to left-center against lefty reliever Matt Moore in the bottom half, before Ortega ripped a game-winning single to right with the bases loaded in the ninth against righty Reynaldo Lopez.