In a region 4-2A semifinal at Milander park, Champagnat converted a field goal as time expired to earn a 34-31 victory over Community School of Naples (9-3).
Led by freshman Calvin Montgomery and his three rushing touchdowns, the Lions improved to 9-1.
"Great team win. We put it on the ground and then they gave me a chance to win. I'm just grateful," said Darren Jones, who delivered the winning kick.
Champagnat will go on to face First Baptist Academy in the regional finals.