SEATTLE — Max Fried’s first start of the season was a self-admitted grind, even though all he did was throw up zeroes.

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In his second go-around Tuesday night, it was more of the same, but there was nothing grinding about it.

Fried was simply dominant across seven shutout innings, mowing down the Mariners in a 5-0 win at T-Mobile Park to continue the Yankees’ terrific pitching to begin the season.

With their third shutout in five games, the Yankees became only the second team in major league history to allow three or fewer runs in their first five games of a season, joining the 1943 St. Louis Cardinals.

“We have a lot of really talented guys that are really motivated,” Fried said. “We’ve been waiting for this opportunity to have the season start and go compete. We want to go win and we’re leaving everything out there. We got a lot of really good arms and we’re throwing the ball well right now, so we’re just trying [to] keep it rolling.”

Fried is now responsible for starting two of those shutouts.

After tossing 6 ¹/₃ shutout innings Opening Day against the Giants, the left-hander was even better Tuesday, scattering three singles, one walk and one hit batter while striking out six in a breeze of an outing.

The Mariners did not reach second base until the seventh inning and never went farther than that against him.

“That was an ace in control of the game,” manager Aaron Boone said.

Brent Headrick and Tim Hill each threw a scoreless inning to complete the shutout, setting up a rubber game Wednesday in which the Yankees will send Cam Schlittler — who started their other shutout on the year — to the mound.

Through five games, the Yankees rotation owns a 0.66 ERA, giving up two runs across 27 ¹/₃ innings.

“They’ve made it easier on us, for sure,” said Giancarlo Stanton, who went 2-for-4 for the fifth straight game. “It’s a much easier at-bat when the other team has zero runs. So just continue to have good at-bats, continue to watch them dominate and try to get this series [Wednesday].”

Just like Opening Day, Fried got an early lead to work with — 2-0 in the first inning — and plenty of run support as the Yankees got to Mariners ace Logan Gilbert, a night after being stifled by Luis Castillo.

Stanton was right in the middle of things offensively once again, driving in a pair of runs while becoming only the fourth player in Yankees history to record multiple hits in the team’s first five games of the season.

The veteran DH finished the night 10-for-20 on the year.

Ben Rice (2-for-2, two walks) reached base four times and Cody Bellinger (2-for-3, walk) got on three times, with each scoring a pair of runs.

Trent Grisham also turned in his best game of the season, going 2-for-4 with a ground-rule double and a strong running catch into the gap in the second inning that robbed Randy Arozarena of extra bases.

“One of those plays early in the game that, if it goes another way, who knows?” Boone said.

After Rice and Stanton each drove in a run in the top of the first, the Yankees added on with three more runs in the sixth to knock Gilbert out of the game.

They did so without leaving the yard, but strung hits together, including an RBI double from Stanton and an RBI single from Jazz Chisholm Jr. to give the pitching staff even more breathing room.

“[Stanton] has been one of the best hitters in the game for a long time,” Fried said. “To see him healthy and out there and ready to do damage, it’s not a fun at-bat when you’re up there facing him. So when he’s locked in like this, I’m really glad I’m on this side, not the other side.”