PORTLAND, Maine — The New Britain Rock Cats took the series opener Friday Night against the Portland Sea Dogs 5-1 in front of a sellout crowd at Hadlock Field, extending their win streak to seven while Portland dropped its fifth straight at home.

Shane Victorino, appearing on rehab assignment from the Boston Red Sox, ended the night 0-for-3 with a strikeout. He played right field for six innings.

Sea Dogs’ starter Luis Diaz (0-4) allowed two earned runs on two hits while walking one and striking out seven over four innings.

New Britain got on the board with two outs in the top of the fourth when David Dahl stole second base and Sea Dogs’ catcher Mike Blanke threw the ball into center field, allowing Tom Murphy to score from third base. Will Swanner followed up with a double to make it a 2-0 game.

The Rock Cats stole six bases in the game.

Carlos Hernandez (2-0) got the win for New Britain, allowing one unearned run on seven hits in 6.2 innings, while walking none and striking out six.

Carlos Asuaje scored the lone Sea Dogs run on a throwing error by Will Swanner. Oscar Tejeda went 2-for-3 and has now registered multiple hits in seven of his last eight games.

Victorino, 34, was placed on the 15-day disabled list on April 25th with a right hamstring strain. In 12 games with the Red Sox this season, he is hitting .143 (5-35) with a double, two RBIs, six walks, seven strikeouts and two stolen bases.

A member of two World Series champions (Red Sox, 2013; Phillies, 2008), Victorino is in his third season in the Red Sox organization after spending nine years in the majors with the Padres (2003), Phillies (2005-12) and Dodgers (2012).