DJ LeMahieu had never been more deserving to hear chants of “M-V-P.”

The breakout star of the Yankees’ season seized the spotlight again in Game 1 of the ALDS, as LeMahieu delivered his first career postseason home run and then sealed the 10-4 win over the Twins with a three-run double in the seventh inning.

LeMahieu, who went 3-for-20 with no RBIs in five playoff games with the Rockies the past two years, went 3-for-5 with four RBIs on Friday night and continued his storybook first season in pinstripes, in which he finished second in the American League with a .327 batting average and recorded a career-high 26 home runs and 102 RBIs, while being selected as an All-Star for a third time.

The 31-year-old became the second Yankee to record four RBIs in his first playoff game with the team (following Bobby Abreu), and the first Yankee with at least three hits and four RBIs in the playoffs in eight years (after Robinson Cano).

“It felt good to come through,” LeMahieu said. “Just trying to put good swings on balls, relax and do my job.”

LeMahieu’s memorable evening began with a rare defensive blunder, in which the first baseman dropped a pop-up in the second inning, giving the Twins a pair of runners on base. LeMahieu was bailed out on the next at-bat, with Gio Urshela turning an inning-ending double play on a Luis Arraez grounder.

“Honestly, it’s like my worst nightmare, dropping a pop-up like that,” LeMahieu said. “I think in the playoffs, you’ve just got to kind of turn the page real quick.”

LeMahieu did it himself.

With the Yankees trailing 2-0, LeMahieu opened the bottom of the third with a bloop single, and scored the team’s first run — on an Edwin Encarnacion double — of a key three-run inning.

LeMahieu returned to the plate with one out in the sixth and took the first pitch from Cody Stashak into the left-field bullpen. As the utility infielder rounded the bases, the crowd revived the “M-V-P” chants LeMahieu has been serenaded with so often during a season in which he continually defied the modest expectations for a player who never had hit more than 15 home runs in a season.

One inning later, LeMahieu — who led the majors with a .389 batting average with runners in scoring position — cleared the bases with a two-out rope to left. The Yankees took a 10-4 lead. LeMahieu took in another round of “M-V-P” chants.

“I was actually in the video room when he came up with the bases loaded, and I said, ‘Let me go outside, because I want to watch this double,’ ” Gary Sanchez said. “That’s what happened. Everything he does, there’s such joy for us. He’s just a great ballplayer.”

The player who arrived in The Bronx with little fanfare — on a two-year, $24 million deal — was treated like the borough’s most beloved.

“He’s unbelievable,” Edwin Encarnacion said. “He’s one of the best hitters I’ve ever seen.”