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.