Jon Constant burst through the Glenn defensive front and headed for the secondary. It was only his second touch of the game, and he made the most of it.

Constant faked a defensive back to the ground, shook off a tackle and bolted into the open field for a 47-yard touchdown.

The second-quarter scoring run ignited a stagnant Shoreham-Wading River offense and sent the undefeated Wildcats to a 21-6 win over previously unbeaten Glenn on Saturday in a Suffolk IV football game. The first of John Mahoney's three extra-point kicks proved to be the winning point.

"We save the big plays for when we need them, and we needed one right there," said Constant, who rushed for 126 yards on seven carries and scored two touchdowns. "The counter adds a little wrinkle to our offense."

The wrinkle was a counter run to the left that caught the Glenn defense by surprise and sprung Constant into the clear.

The Wildcats went back to the same play late in the third quarter. Guard Dalten Stalzer threw a crushing block that allowed Constant to run 49 yards and score untouched for a 14-6 lead with 59 seconds left in the quarter.

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"It's a great feeling when you make the block to spring the back for the big touchdown," Stalzer said. "It makes me feel like I scored the touchdown."

"We're a physical, ball-control team," Shoreham tight end Ethan Wiederkehr said. "We were all business today against a very good team. I'm proud of our guys because we're playing every game with a lot of confidence."

Defending Long Island Class IV champion Shoreham-Wading River (7-0) won its 19th straight game and shut down a Glenn offense that had been averaging 44 points per game.

Glenn (5-1) opened the scoring on an athletic play by quarterback Wayne White. He dropped back to pass, encountered heavy pressure, danced inside it, skipped out of Chris Rosati's tackle in the backfield and broke outside on a scramble for 23 yards to the Shoreham 1-yard line.

Two plays later, White found Shihan Rudyk with a 2-yard scoring pass. The extra-point kick was blocked and the Knights led 6-0 with 7:38 left in the half.

It was the only time the Knights reached the red zone. They were shut down by a swarming Wildcats defense in the second half, gaining only 62 yards.

"We smothered their offense for most of the game," said defensive end Ryan Letscher, who had seven tackles and a fumble recovery. "We took good angles to make tackles and contain their quarterback, who can be very elusive."

Constant's two big scoring runs paved the way for a Shoreham offense that found its rhythm in the fourth quarter. Quarterback Jason Curran scored on a 6-yard run with 1:21 left for a 21-6 lead as the Wildcats drove 68 yards on 10 plays and ran 5:13 off the clock.

"This felt like a championship game with the top seed in the playoffs on the line," Constant said. "And it keeps our winning streak going."