Born the son of Nancy and Rick Paus, Casey prepped at Lincoln-Way High School, where he participated as a member of the football team, leading his team to a 12–1 record and a No. 3 state ranking in his senior year. Paus posted a 42–2 career record and finished career with 5,734 yards passing and 51 TDs.[2] Paus was ranked sixth in the nation at QB by Rivals.com.