Luis Severino doesn’t know for sure if he’s thrown his final pitch as a Yankee.

The pending free agent is concentrating first on his season-ending oblique injury.

The two-time All-Star will head into free agency this winter coming off the worst of his eight seasons in pinstripes, posting a 6.65 ERA over 19 starts.

“I don’t know. Right now I’m [not] thinking about that,” Severino said when asked before Sunday’s game if he believes he will pitch for the Yankees next season. “I just think about what I need to do to get better pretty soon.

“If it is [the end with the Yankees], I gave everything I got. I was trying to get better every time. A lot of guys here, a lot of people, helped me get through worse days. I’m very happy that I did.”

The 29-year-old Severino had been pitching better over the past month, posting a 3.16 ERA in his final five outings before departing Friday’s game with sharp pain on his left side, which he described afterward as “like somebody shot me.”

He added Sunday that the pain has decreased, saying, “It’s getting better every day.”

Severino also said he was told the injury usually takes “at least six weeks” before resuming baseball activities.

“I’m not happy the way it went, but I’m happy that it’s not gonna be something that is gonna take a full year to recover,” he said.

Severino missed the entire 2020 campaign and most of 2021 following Tommy John surgery, and he also opened this season on the injured list due to a strained lat muscle.

“It’s been a very tough year, physically, mentally,” Severino said. “I just wanted to be out there, be healthy, and be helping my team. For myself, as well as the team, it’s been a rough year for everybody … with a lot of guys on the IL. So it’s been a really tough year.”

The Yankees called up lefty Anthony Misiewicz along with right-hander Matt Bowman before the game to provide some fresh arms for a struggling bullpen and Misiewicz earned the win with a scoreless inning in the 13th in a 4-3, 13-inning win.

They were recalled to take the place of Ron Marinaccio and Matt Krook, who were optioned to Triple-A Scranton/Wilkes-Barre following Saturday’s loss.

The 28-year-old Misiewicz split time in the majors with Arizona and Detroit before the Yankees selected him off waivers in July. He’s pitched in 127 major league games over parts of four seasons.

Aaron Boone said Bowman and Misiewicz had been in the conversation lately, as the Yankees have been forced to churn through bullpen arms late in the season.

“It’s left us thinner than we’ve been all year,’’ Boone said. “They’ve both had solid years down there.”

Bowman, 32, last pitched in the majors in 2019 with the Reds before injuries derailed his career. In parts of four seasons with Cincinnati and St. Louis, Bowman appeared in a total of 183 games. He was put on the Yankees’ 40-man roster after opting out of his minor league deal in June.

Marinaccio and Krook have both disappointed this year, with Marinaccio unable to stick in the majors after a promising 2022 and Krook unable to produce when given the opportunity in the majors this year.

During the offseason, the organization had hoped the 28-year-old lefty could become a bullpen piece, which is why he was on the 40-man roster.

But he’s been scored upon in three of his four appearances.

Isiah Kiner-Falefa was in the lineup on Sunday for the first time since Sept. 1, having lost playing time to young outfielders like Jasson Dominguez, Everson Pereira and Oswaldo Cabera and infielder Oswald Peraza.

“What he’s shown here the last couple years is he’s such a great pro and wants to be a Yankee,’’ Aaron Boone said of Kiner-Falefa. “He’s been through a lot here and faced it head on.”

A year ago, Kiner-Falefa was benched at times at shortstop both down the stretch and in the postseason.

He proved to be a valuable, versatile defender much of 2023, becoming a solid outfielder after never playing there before this year.

On Sunday, he was at third base.

“He’s taken it upon himself to try to be a mentor,’’ Boone said. “It’s in line with who he’s been since he got here. He’s been a pro, been ready to go, and hopefully we get him more opportunities as we go.”