The Yankees were an excited bunch when DJ LeMahieu’s walk-off home run cleared the wall in right field to deliver a 4-3 win in 11 innings Saturday afternoon.

For Aaron Boone, there was also a big sigh of relief.

The Yankees manager has been mostly sharp this season challenging calls, but Saturday may have been the one that got away.

It was a tie game in the top of the seventh inning when Matt Chapman drilled a pitch from Adam Ottavino down the left-field line. It was called fair and scored Robbie Grossman from second to put the Athletics up 3-2.

TV replays in slow motion appeared to show the ball landing just barely foul, though, and the Yankees did not challenge. There was an imprint of the ball on the dirt in foul territory, but the foul line appeared untouched. Play carried on, and until Aaron Judge hit a home run in the bottom of the eighth, Chapman’s questionable double was set to be the game-winning hit.

Before the Yankees’ comeback, though, the decision not to challenge the call was beginning to eat at Boone.

“Oh yeah,” he said. “And to have the guys bail me out of that is huge, because ultimately that comes down to my decision. I probably should have done that. Yeah, big time of the guys to pick me up there.”

Boone has challenged 21 calls this season and 15 have been overturned. They waited as long as they could in the seventh inning, he said, trying to get a better look at if Chapman’s hit was fair, but landed on not challenging it.

It was not quite Joe Girardi in Game 2 of the ALDS in 2017 — when Girardi failed to challenge a hit-by-pitch that wasn’t, which led to a loss against the Indians before his team backed him up and won the series — but Boone took the blame nonetheless.

“Ultimately, I think I probably should have challenged it,” Boone said. “Kind of running out of time there, it was pretty gray for us. That one’s on me, because I think there’s a chance. I haven’t looked at it yet, but just as the game unfolded, hearing some of the people talk about it, maybe should have done that.”

Left fielder Mike Tauchman was shaded over toward the gap, so he said he could not tell whether the ball landed fair or foul. But he gave his manager the benefit of the doubt.

“Most of the time when we review stuff, we’re right,” Tauchman said. “So I trust them.”