Officials at a private Missouri high school suspended its football program, fired all the team’s coaches and forfeited its undefeated season after learning coaches had been using an ineligible player.

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Cardinal Ritter junior running back Bill Jackson, who wore No. 4, was ineligible to play after being ejected from a 2018 championship game. However, Jackson, disguised as freshman "Marvin Burks," wearing No. 24, played -- running for 109 yards, including a 56-yard touchdown in a recent 32-21 win.

Jackson’s tattoos gave away the ruse.

Cardinal Ritter school President Tamiko Amistead announced the self-imposed sanctions Friday, the St. Louis Post Dispatch reported.

The Lions were undefeated seven games into the season. They will forfeit those games, as well as the final two.

The school’s longtime athletic director also retired.

Coach Brandon Gregory apologized for the mistake.

"That's kinda my wrongdoing of not knowing the rules and that he shouldn't have not sat out the jamboree, he should have sat out week one so that's what happened," he said, CBS Sports reported.

The school did not indicate when or if it would restart its program.

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In this file photo from October 2024, Atlanta Braves outfielder Jorge Soler and teammates react after losing to the San Diego Padres 5-4 in San Diego. The Braves and Soler, who now plays for the Los Angeles Angels, face a lawsuit by a fan injured at a 2021 World Series game at Truist Park in Atlanta. (Jason Getz/AJC)

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