CENTRAL ISLIP, NY — Providing the Ducks with extra outs can be the death-knell of opponents right now.

Somerset flubbed two routine ground balls in the third inning Monday night. Consider that the key to failure, as the Ducks capitalized by scoring five runs en route to a 13-4 blowout victory over Somerset in Game 2. By sweeping the doubleheader over the Patriots, the Ducks extended its winning streak to six and have now won 11 in the past 13.

The surging Ducks offense was mostly quiet in the opener of the twin seven-inning contests. But Rob Sandora produced the clutch hit, breaking a tie via a two-out RBI single in the sixth inning as the Ducks won Game 1, 3-2, in front of the 38th sold-out crowd at Citibank Park this season.

Earlier in the evening, Southern Maryland snapped an eight-game losing streak. But the Ducks still gained a half-game in the Liberty Division standings, now sitting four games on the top spot.

“It’s good because we have to work for everything we’re getting right now,” manager Dave LaPoint said. “Everybody’s working pretty hard to get there. They feel good about themselves.”

Despite playing just seven innings, the Ducks still cracked the double-digit run total for the fourth time in six games. Kevin Haverbusch continued his torrid hitting in the nightcap, recording three RBIs to support Jose Paniagua’s strong start. Pete Rose Jr.’s grand slam padded the run total and allowed LaPoint to rest the majority of his key relievers.

Following Abe Alvarez’s complete-game, two run gem, Paniagua followed with another quality start in the second game. The righty did not allow an earned run in five innings, improving to 3-0 as the Ducks are riding its longest winning streak of the season.

“What’s good about us is, if there’s a guy on second with less than two outs, we’re going to try and get them over for the next guy,” Rose said. “The big thing is if I don’t get my job done, other guys will pick me up.

“Guys are starting to understand that if we don’t get the job done, we have confidence in the guys behind us that they will pick us up.”

The Ducks batted around in the second, scoring five times against Somerset’s Josh Brey. Richard Hidalgo’s leadoff single resulted in a run two batters later. Damian Rolls saw his 22-game hitting streak end in the first game but started a new ledger in his first at-bat, driving home Hidalgo before scoring on Haverbusch’s single.

Nook Logan added a two-run triple and scored on Carl Everett’s RBI infield single as the Ducks forged a 5-0 lead. The only bad news for the Ducks was Hidalgo exiting after making the last out in the third. The former Mets outfielder did not come out for the top of the third. Sandora entered into the game as his replacement.

“He jammed his hip a little bit going back to first base,” LaPoint said about Hidalgo, who he listed as day-to-day. “We had a big lead. There was no sense in taking a chance and running him out there anymore. I’m sure if he gets some rest tonight, he’ll be fine tomorrow.”

Edgardo Alfonzo misplayed a pop up to start the third. That miscue led to two unearned runs on a pair of sac flies. Paniagua would not allow another runner to cross the plate, giving way to Ryan Knippschild with a 12-2 lead to start the sixth.

The Ducks turned the game into a laugher in the fourth. Brey retired the first batter and induced Rolls to hit a slow roller to first. Josh Pressley couldn’t keep the ball in his glove for an error and a walk to Pogue chased Brey.

Rick Asadoorian entered and struck out his first batter. A walk loaded the bases but Asadoorian appeared to get out of the jam, forcing Dennis Donovan to hit a grounder to short. Teuris Olivares booted the ball, allowing Rolls to score while reloading the bases for Rose.

Rose drilled his ninth homer of the season, taking Asadoorian’s offering to right that fell just short of the second row of advertisements. All five runs in the inning were unearned.