Will Mostaert beat identical twin brother Eli into the world by 13 minutes and it's been game on ever since.
They stormed away from the table when a game of "Sorry!" with Grandma didn't go their way. Later, they tossed Xbox controllers for similar reasons.
Now, the seniors' competitive fire warms No. 1-ranked Lakeville North's entire defense. Both measure 6-4 and about 245 pounds. Both play on the defensive line. And together, they provide the undefeated Panthers a double shot of intensity, energy and personality.
"They'll test your patience," Lakeville North coach Brian Vossen said. "And not because of their effort or their play. But last season, I had to call a timeout to go out there and tell them to shut up.
"They are hard on each other to the point where you wonder if they're too hard on each other," Vossen said.
It's just who they are.
"We try to make each other better and help the team win games," said Eli, who will join his brother at North Dakota State. "If we do something good, it gets us hyped. Then the defense steps up and does something good and then the student section gets hyped."
Those chain reactions are common. Heading into Lakevile North's game Friday against No. 8 Prior Lake (4-2) at Twin Cities Orthopedics Performance Center in Eagan, the Mostaerts have produced 18 tackles for loss and eight sacks. The Panthers (6-0) permit fewer than two touchdowns (12.3 points) per game.