On the night they celebrated the 60th anniversary of The Beatles’ invasion of Shea Stadium, the crashing Mets endured yet another hard day’s night at Citi Field.

HELP!

Deadline acquisition Ryan Helsley and the overhauled bullpen coughed up a late lead for the second consecutive night as the Mets fell for the 14th time in 16 games with an 11-9 shootout loss to the Mariners in Flushing.

Another bullpen newcomer, Tyler Rogers, also gave up a run in the sixth to cut a 6-4 Mets lead to one.

“It’s hard to describe, especially with how much talent and the elite arms we have back there [in the bullpen],” manager Carlos Mendoza said. “Some of the guys we brought in here, you could say that’s one of the strengths of our team. … The past week or so we haven’t been able to do that.

“They’re going through a stretch where it’s really hard as a unit and we gotta get them back on track. For us to get to where we wanna get, they’re gonna play a huge role in this. … We’re gonna need all of them.”

Mendoza’s flailing team only maintained a half-game lead for the final NL wild-card spot because the Reds flushed an 8-1 advantage and lost to the scorching Brewers in Cincinnati.

Sean Manaea was tagged for two homers and four runs on six hits in five innings, his seventh straight start since returning from the injured list without completing at least six innings.

Ryan Helsley struggled once again in the Mets’ latest loss, an 11-9 defeat to the Mariners on Aug. 15, 2025. Charles Wenzelberg / New York Post

The lefty sports a 7.98 ERA over his past three outings.

Helsley couldn’t hold a 6-5 cushion in the seventh — after also squandering an eighth-inning lead in Thursday’s loss to the Braves — permitting Seattle to tie the score on doubles by MLB home run leader Cal Raleigh and Eugenio Suárez.

The hard-throwing Helsley, a former closer with the Cardinals, has allowed five earned in 5 ¹/₃ innings over six appearances with the Mets.

Brooks Raley reacts in frustration after giving up a two-run double to Cole Young in the seventh inning of the Mets’ loss to the Mariners. Charles Wenzelberg / New York Post

“Look, man, at the end of the day, getting ready, he has to come in and get three outs,” Mendoza said. “Right now, he’s having a hard time doing that … I’m not sure if it’s the role, I think it’s more of just execution.”

The Mariners then added four more runs in the inning on run-scoring hits by Dominic Canzone and Donovan Solano and a two-run double by Cole Young against lefty Brooks Raley, with both relievers booed off the mound.

Demoted starter Frankie Montas also heard jeers while giving up an additional run in the eighth before Francisco Alvarez pulled the Mets back within two with a three-run homer to right in the bottom half.

Sean Manaea gives a dejected reaction after giving up a home run during the Mets’ loss to the Mariners. Charles Wenzelberg / New York Post

Francisco Lindor also went deep twice and Juan Soto ripped his 30th of the year earlier in the game for the Mets, whose record since June 12 is an abysmal 19-34.

“It’s part of the mountain we gotta climb. … Right now we’re in a very steep part of it,” Lindor said. “If we don’t get ourselves together and we don’t push ourselves to be better, the mountain is going to be tough to climb.”

The Mariners reached Manaea for a run in the first inning, but Lindor answered right away with his second home run in as many nights, an opposite-field shot to left against Seattle starter Luis Castillo.

Cal Raleigh celebrates by holding a trident after hitting a home run in the third inning of the Mets’ loss to the Mariners. Charles Wenzelberg / New York Post

Francisco Lindor homered twice in the Mets’ loss to the Mariners. Charles Wenzelberg / New York Post

Mitch Garver put Manaea in another hole in the second, clocking a 3-2 sweeper over the wall in center for his seventh homer and a 2-1 Seattle lead.

But Alvarez evened the score again in the bottom half with a two-out RBI single to center after Jeff McNeil opened the inning against Castillo with a double to right.

Lindor nudged the Mets ahead 3-2 with a run-scoring single to center, but Raleigh pulled an 0-1 four-seamer from Manaea over the left-field wall for his MLB-leading 46th of the season and a 4-3 Seattle lead in the third.

Francisco Alvarez celebrates after hitting a three-run homer in the eighth inning of the Mets’ loss to the Mariners. Robert Sabo for NY Post

That moved Raleigh within two of Salvador Perez’s single-season record of 48 home runs by a player whose primary position is catcher in 2021.

Lindor responded again in the bottom of the inning with his 24th, a two-run shot to right off Castillo for his third multi-homer game of the year.

Soto followed with his 30th of the year on Castillo’s next pitch for a 6-4 Mets advantage, but the Mets once again failed to close out the lead.

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“We’re not having a terrible season, we’re having a tough stretch,” Lindor said. “Teams are outplaying us and it doesn’t feel good. This is when teams come together and good teams, they turn it around and go far.”