PORTLAND — The Portland Sea Dogs (50-26) became the first team in professional baseball to 50 wins with a 3-2 Eastern League victory over the New Hampshire Fisher Cats (31-44) in the series opener Monday night at Hadlock Field.

The win pushes the record to 4-1 on the homestand for the Sea Dogs.

Luis Diaz took the hill for his home debut and picked up where he left off in his first Double-A start. The righty retired the first five batters he faced.

Portland grabbed a 2-1 lead with a pair of runs in the second inning off of Austin Bibens-Dirkx. Sean Coyle began the frame with an opposite field solo home run to right-center field, his eighth, to tie the game. Heiker Meneses gave the Sea Dogs the lead for good with a single that plated David Chester from second.

Deven Marrero stayed redhot following his Eastern League Player of the Week honors, homering to left-center field to begin the third to up the lead to 3-1.

Diaz took the lead and rolled with it. He was helped out by a 9-6 double play in the third, pitched around a two-out walk in the fourth and induced another double play in the fifth. The Venezuela native retired the side in order in the sixth and, again, worked around a two-out baserunner in the seventh to keep it a tworun lead for Portland. The righty finished a career-high eight innings and allowed just the one run on seven hits, walked two and struck out four.

The Sea Dogs and Fisher Cats resume their three-game series with the second tilt tonight at 7 p.m.