Churchill was born in Blair, Oklahoma. He attended Central High School in Oklahoma City where he has a successful sports career. Churchill participated on the football, track and field, baseball, basketball and swimming teams and was chosen as a scholastic All-American. He also earned all-state honors in both football and basketball, and he was considered the best all-around high school athlete in the state of Oklahoma.
Churchill enrolled at the University of Oklahoma in the fall of 1926, but due to collegiate athlete athletics rules at the time, freshmen were not allowed to play for their schools' varsity teams. He decided to box for his first year and won titles in both light-heavyweight and heavyweight classifications. When he became eligible to play for the school's sports teams as a sophomore in 1927–28, Churchill played for the football and basketball teams and was selected to the All-Missouri Valley Conference Team in basketball. That season, the basketball team finished 18–0 and were MVC champions. Even though he was a star athlete in multiple sports, basketball was considered his best sport.
1928 Summer Olympics
In the spring of 1928, Churchill won the Kansas Relays' decathlon event. He repeated as the Kansas Relays decathlon champion in 1929. Churchill also qualified to participate in the 1928 Summer Olympics as a member of the United States track and field team. In the field of 38 decathletes, Churchill finished in fifth place in the Olympic decathlon competition.
Later OU days
Churchill returned to Norman in the fall of 1928 for his junior year. While the football team only finished with a 5–3 record and finished third in the Big Six Conference, the basketball team had more success. For the second season in a row they were crowned conference champions as they finished with a 13–2 record. Churchill was once again named all-conference, and at the end of the season he was also honored as a consensus All-American. In 1929–30, his senior year at Oklahoma, Churchill had the most success of his football career. Playing at the end position, and occasionally as a running back, he was honored as an all-conference performer and was also named as a third-team All-American by the United Press and NEA. He was invited to play in the East–West Shrine Game as well. In the winter, the basketball team failed to three-peat as conference champions, and Churchill also failed to repeat as all-conference and All-American. In the springtime, however, he earned his lone varsity letter as a pitcher for the baseball team. The Sooners had great success that season and were crowned co-conference champions under head coachLawrence Haskell. When Churchill's collegiate athletics career was over, he had earned 10 varsity letters in four sports, earned multiple all-conference selections and played on teams that won three total conference championships.
After college, Churchill signed a contract with the New York Yankees farm league. A damaged shoulder prematurely ended his career. Churchill then went on to coach the University of New Mexicomen's basketball team for the 1931–32 and 1932–33 seasons.
