Jack Miles was an integral part of Florida State gymnastics teams which won five NCAA and AAU championships in the 1950s. A versatile athlete, Miles was AAU national champion in the flying rings in 1951. As a senior in 1955, he was national champion in both long horse vaulting and the still rings. He scored 327 points at the AAU national championships and tied as the best All-Around gymnast that same year. In 1955, Miles represented the United States in the Pan Am games and one year later he was a member of the U.S. Olympic team.