Even against a team full of reserves, serving the Nationals a defeat is a small victory for an injury riddled Mets team.

After falling behind early 6-1, The Mets rallied in a big fifth inning that saw them tie the game. Norichika Aoki pushed them in front with a run-scoring double in the sixth, a lead they hung onto en route to a 7-6 victory.

Jeurys Familia earned his first save since May 5 after securing the final out in the ninth.

“He’s worked unbelievably hard every day to finally be back out there in that situation,” manager Terry Collins said. “He’s made this team good by pitching the ninth inning. It was good to see him out there.”

Robert Gsellman kept the Nationals scoreless through the first two innings, but surrendered a three-run bomb to Adam Lind in the third to put the Mets in an early 3-1 hole.

In the fourth, Washington doubled its lead with contributions from Howie Kendrick and top prospect Victor Robles to put the Mets five runs down.

But the bottom half of the frame, New York answered back.

Aoki and Asdrubal Cabrera each chipped in a run to cut the deficit in half, but the big blow came off the bat of Travis d’Arnaud.

The catcher launched a three run blast to central to make it a new ballgame. It was d’Arnaud’s second long ball of the game and No. 15 on the campaign.

The Mets were able to cling on to the narrow lead and come away with a victory. Beyond Gsellman, New York used six relievers who each kept the Nationals at bay.

“There’s guys playing for jobs next year. I think that’s meaningful,” Collins said.

Aoki, who delivered the Mets winning RBI, is hitting .315 (23-for-73) with seven doubles, eight RBI and 11 runs scored in 18 games since being signed by the Mets. He has also reached base safely in 21 of his last 22 games dating to Aug. 20 and in 17 of his 18 games as a Met.

Cabrera also went 2-for-2 with one RBI and two walks. Over his last 26 games, Cabrera is batting .388 (33-for-85) with 11 doubles, four home runs, 18 RBI and 14 runs scored. This month, Cabrera is batting .403 (25-for-62).

On Saturday, Noah Syndergaard will take the mound for the first time since the end of April. He will toss one inning before handing the ball over to Matt Harvey.