There’s a line you don’t cross in Sachem — and it runs tackle to tackle.

The Suffolk district’s North and East high schools, whose players are friendly off the field but fierce rivals on the gridiron, have offensive lines that double as the Great Wall of China for the 2025 season.

“When it comes to our lineman development program, we say you have to stick them in a slow cooker … they go from a piglet to a hog over four years,” Sachem North head coach David Caputo told The Post.

“They get weighed in 52 weeks of the year, and we are constantly monitoring their calorie intake. There’s a pathway laid out for them as ninth graders,” he said.

Senior lineman Valdey Pierre is the perfect example, as he weighed less than 200 pounds in ninth grade and is now a muscle-filled 268.

“They just real

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