MILWAUKEE — Mason Miller sat quietly at his locker, between Nick Pivetta and Griffin Canning, in a somber visiting clubhouse Sunday evening.

It didn’t matter that he was asked to fetch six outs against baseball’s winningest team in a hostile environment. He failed, he’d done so by shooting himself in the foot three times, and now he’s got a full day to absorb a blown save that sends the Padres back to San Diego needing to win three straight games against the 103-win Brewers to keep their season alive.

The All-Star closer wasn’t as much looking for the next opportunity to flush it as he was wishing for a mulligan.

“Probably just to get back there and start the ninth over and throw everything down the middle,” Miller said after walking three batters in the ninth inning of a 4-3 loss in Game 2 of the National League Division Series on Sunday. “And if they hit it, they hit it. Cardinal rule is pretty much: You don’t beat yourself. And I beat myself today. You know, I mean, a base hit with nobody on doesn’t win them the game.

“A base hit after you walk the bases loaded does.”

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Miller’s wild streak arrived after he needed just 12 pitches to strike out two in a scoreless eighth against Brice Turang, Jake Bauers and William Contreras.

The Padres went into the game with Miller pegged for six outs after left-hander Adrian Morejón threw six outs in taking the loss on Saturday. Miller was even up in the seventh inning as the top of the Brewers’ lineup loomed before Bradgley Rodriguez got an inning-ending grounder from Jackson Chourio to clean up Yuki Matsui’s attempt at a second inning of work.

“I think the top of the lineup in the eighth probably made that decision for Mason,” Padres manager Craig Stammen said. “I think going into the game we were thinking of Mason for six outs, especially how quick that eighth inning went for him. He was just battling the strike zone there at the end.”

Protecting a 3-2 lead for a second straight frame, Miller didn’t actually lose the strike zone until getting Garrett Mitchell to ground out to start the ninth.

He threw four straight balls after starting Christian Yelich with a called strike on a slider. Sal Frelick battled back from down 1-2 for the second walk of the inning. After Miller got a fly ball from pinch-hitter Andrew Vaughn, he walked pinch-hitter Gary Sanchez on six pitches to load the bases.

Chourio came up with a plan of attack.

“I knew he was a little bit erratic,” the Brewers’ leadoff hitter said. “He was throwing some balls. I knew he was going to come at me with the fastball at some point, so mentally I was just making sure I was prepared for that.”

And he was, lining a middle-away, 101 mph four-seamer up the middle and just out of the reach of a diving Jake Cronenworth to send the Brewers to a walk-off win.

The blown save was Miller’s fourth of the year, but his third in his last 14 appearances (5.51 ERA).

If he’d gotten the job done, it would have been his third six-out appearance of the season and first since Sept. 4.

“Yeah, I mean it’s the playoffs, so you’re prepared for whatever,” Miller said of the workload on Sunday.

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Miller did not allow a run this season until April 27 after extending his scoreless streak to a franchise record 34⅔ innings. He earned the second All-Star selection of his career, finished tied for the NL lead with 38 saves and led all relievers with 129 strikeouts, a new career high.

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As he prepared to board a flight back to San Diego, the 28-year-old reliever said he’d lean into that resume to help prepare for Game 3 of the NLDS on Tuesday at Petco Park.

“That’s not the first save I’ve blown, and it probably won’t be the last one I blow either,” Miller said. “That’s part of the job. Failure in my role is really hard to move past … because most of the time when you fail, you lose. In other spots, you get another chance, but that’s part of it.

“I’m going to come back and be prepared to pitch again on Tuesday and do my best to help the team win.”