Binghamton leads the best-of seven series 2-0.
Kaspars Daugavins netted a pair of goals for the Senators while Zack Smith and Bobby Butler each netted one goal.
Mark Mancari paced the Pirates with two goals while Derek Whitmore also scored. Matt Ellis
collected two assists and Luke Adam
, Maxime Legault and Mark Voakes each registered a helper one assist.
Whitmore gave the Pirates the early lead with the only goal of the opening period and Mancari made it 2-0 Portland early in the second. However, Daugavins connected shorthanded, the first of three consecutive Senators goals (Smith and Butler scored the others) to send the visitors into the third with a one-goal lead. Mancari's second of the game tied it midway through the third but Raymond and Daugavins (into an empty net) completed the scoring.
The Pirates out shot the Senators 46-26 in the game as Jhonas Enroth
took the loss in his first appearance with the Pirates since the beginning of March. Enroth, who made an appearance in Game 7 of the Stanley Cup Playoff series between Buffalo and Philadelphia on Tuesday, finished with 21 saves.
The Allied Home Mortgage Three Stars of the game were: 1. Raymond, 2. Mancari and 3. Smith.
The Calder Cup Playoff series now heads to Binghamton for games 3, 4 and 5 on Saturday, Monday and Tuesday, respectively.GAME 2 BOX SCORE