PORTLAND — The Portland Sea Dogs (36-63) scored four runs in the bottom of the ninth to stun the New Hampshire Fisher Cats, 4-3, in an Eastern League contest in front of a sellout crowd at Hadlock Field on Thursday.

Tzu-Wei Lin delivered the game-winning RBI single with the bases loaded and two outs in the bottom of the ninth to give the Sea Dogs their sixth straight home win via walk-off.

With one out in the bottom of the ninth inning, Colt Hynes walked Reed Gragnani and allowed a single to Aneury Tavarez to bring the tying run to the plate. Manuel Margot lined a base hit to center field that skipped over the head of Roemon Fields and rolled all the way to the wall in center field, allowing two runs to score and Margot to wind up at third base with a triple. Carlos Asuaje followed up with a bloop RBI double to tie the game at three.

Danny Barnes entered the game and walked two before allowing the gamewinning hit to Lin.

Jorge Marban (2-0) was the winning pitcher for Portland, pitching a scoreless ninth while issuing one walk.

New Hampshire got on the board in the third inning when Martin Medina hit a solo home run to lead off the frame. The homer was the first for Medina since 2013.

The Fisher Cats added two more runs off of Luis Diaz in the fifth inning on a sacrifice fly by Medina and a balk. Diaz worked his fifth straight quality start and sixth in his last seven outings, going 6 1-3 innings and allowing three earned runs on five hits, walking one and striking out one.

Jef f Hoffman, making his second career Double-A start, threw 5 1-3 scoreless innings for New Hampshire. Hoffman walked two and struck out five.

The teams meet again tonight in game two of a four-game series at 7 p.m.