WASHINGTON — The Mets lost a game, some momentum and they hope nothing more.

A rally stalled, a super-bullpen was wasted and Brandon Nimmo was a concern during a 5-4 defeat at Nationals Park on Wednesday, when the Mets snapped a three-game winning streak.

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The Mets (67-59) fought back from a four-run deficit that Kodai Senga dug — but not all the way back in a game that did not include Nimmo past the second inning.

The scare arrived quickly: Nimmo, who had grounded into a double play in the first, was out of the game by the bottom of the second with what the team called neck stiffness .

Nimmo has

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