TRENTON, N.J. — Ramon Flores lined an RBI single to center field, giving the Trenton Thunder (69-64) a 3-2 walk-off win in 10 innings over the Portland Sea Dogs (64-69) on Sunday night at Arm & Hammer Park.

Trenton has a five-game lead over the Sea Dogs for the second playoff spot in the Eastern League’s Eastern Division.

Portland was down to its final strike twice in the ninth inning, but tied the game on a bases-loaded walk on a 3-2 pitch to J.C. Linares. The Sea Dogs loaded the bases with nobody out off Danny Burawa, but Deven Marrero hit into a 1-2-3 double play. Burawa walked Garin Cecchini and Linares on 3-2 counts.

Charley Short tossed a scoreless inning to earn the win in his Double-A debut. Terry Doyle (1-5) gave up two hits and one run over 3.1 innings, but suffered the loss.

In the 10th, Reegie Corona led off with a single, advanced to second base on a sacrifice bunt by Mason Williams and scored on Flores’ single.

The Sea Dogs left 12 runners on base and went 1-for-10 with runners-in-scoring position.

The Thunder took a 1-0 lead after the first. Jose Pirela doubled with two outs and scored on an infield single by Gary Sanchez.

Michael Almanzar led off the second with his 15th homer of the season, his second homer of the series, to tie the game, 1-1.

Trenton grabbed a 2-1 lead in the fourth, but Chris Hernandez induced a double play to prevent further damage. Kyle Roller led off with a single and Yeral Sanchez walked with one out. Corona delivered a run-scoring single to left.

Hernandez worked six innings on six hits, two runs (one earned), two walks and tied a season-high with five strikeouts.

Mikey O’Brien fanned nine over 6.2 innings for the Thunder, giving up one run without a walk.

Cecchini went 0-for-4, but extended his on-base streak to 34 games with a walk in the ninth. Almanzar, Derrik Gibson, Travis Shaw and Shannon Wilkerson each had two hits for Portland.

The Sea Dogs open a fourgame series at the New Hampshire Fisher Cats tonight at 7 p.m.