MANCHESTER, N.H. — The Sea Dogs didn’t give up much to the New Hampshire Fisher Cats on Monday night.

But what they did allow cost them the game when Moises Sierra delivered a one-out, bases-loaded single up the middle to score Anthony Gose for a walk-off Fisher Cats win.

The 1-0 triumph improved New Hampshire’s record to 18-11 and dropped Portland to 10-18, 2-11 on the road. The teams meet again in the middle game of the three-game set at 6:35 tonight..

“That was a well-played game with very good defense and very good pitching,” said Portland Manager Kevin Boles. “There weren’t many opportunities, and they were able to string together a couple of hits late.”

The Fisher Cats managed just three singles off Portland starter Stolmy Pimentel and reliever Seth Garrison through the first eight innings. They did all their damage with three more singles off right-hander Eammon Portice in the ninth.

Gose led off the bottom of the ninth with his second single of the night on a 3-0 pitch and Adeiny Hechavarria followed with one off Portice, too. Gose hustled to third on a ball in the dirt and then Hechavarria went to second on defensive indifference and the Sea Dogs intentionally walked Darrin Mastroianni.

Portice struck out Mike McDade for one out.

Sierra was up next and finished it off on the first pitch.

Pimentel turned in his longest Double-A outing, and he and Garrison were impressive.

The 6-foot-4, 225-pound Pimentel gave up three hits, struck out seven and walked one.

“He had a real crisp fastball, had a feel for his breaking ball and change-up tonight and did a nice job with their running game,” Boles said.

“Hats off to their starting pitcher,” said Fisher Cats starter Chad Beck. “He had a heck of a game. It was a battle from the first inning to the ninth.”

Garrison allowed no hits, struck out two and walked none in two innings.

The Sea Dogs had the better of the chances through the night, but the Fisher Cats kept them scoreless with some sparkling defense and timely pitching.

Portland had the bases loaded with one out in the top of the second and Beck struck out Jon Hee and got Che-Hsuan Lin to ground back to the mound to end the inning.

Fisher Cats left fielder Matstroianni made a diving catch in the gap in left-center to save a run, ending the seventh.

In the sixth, Portland’s Will Middlebrooks doubled with one out to the gap in right-center, but a relay from center fielder Gose to second baseman Craig Stansberry to catcher Travis d’Arnaud cut down Ryan Lavarnway at the plate.

“That’s a ball you think you should be scoring on, but the ball caromed off the wall,” Boles said. “They’ve got 400 feet worth of throws to go and they made two quality throws, back-to-back.”