Donte Starlin-Merriam scored on a 46-yard rushing touchdown on the very first play from scrimmage for Sun Prairie to take a 7-0 lead over Beloit Memorial.
The Cards then scored on their next drive as Ryan Curran hit Michael Marchese on a 3-yard touchdown pass to make it 15-0 after a 2-point conversion.
Sun Prairie added 30 more first half points to beat Beloit 45-6.