A miserable season for Gary Sanchez nearly turned around with one swing of the bat, as the catcher sent a 3-2 pitch from Boston closer Craig Kimbrel deep to left with the bases loaded and one out in the bottom of the ninth.

The ball, though, fell just short of the fence and went for a sacrifice fly. It brought the Yankees to within a run, but that was as close as the Yankees got in a 4-3 season-ending loss Tuesday in Game 4 of the ALDS in The Bronx.

“Gary literally came up a foot short of sending us to Boston,’’ Zach Britton said. “That’s the most frustrating part, the at-bat that he put together.”

Despite how close he came to extending the series, Sanchez didn’t think the ball was gone.

“No,’’ Sanchez said through an interpreter. “I hit it well, but I got under it a little bit.”

It was a perhaps a fitting end for Sanchez’s season, as he battled inconsistency at the plate and many questions behind it. He also battled a groin injury that sent him to the disabled list twice.

“It’s not the season I wanted,’’ Sanchez said. “For me, it was a tough year. There were a lot of ups and downs. It was not a good year based on my standards.”

Sanchez acknowledged he still has work to do defensively — and not just when it comes to passed balls. He committed an MLB-worst 18 this season.

Even more surprising was the slump Sanchez found himself in for most of the year.

“They were pitching me tough throughout the whole season,’’ Sanchez said of opposing pitchers. “They were pitching me outside of the strike zone and I was swinging at bad pitches. That’s one of the areas I have to improve on, to command the strike zone better and be a more selective hitter.”