Miller won two national BMX titles as a Webco-sponsored rider in his early teens. Miller then rode motocross in the southern California area before switching to Speedway. Miller started his speedway career in 1981, became pro the next year and won rookie of the year. Speedway credits for 1982 include the Ventura track championship and the US Open National Championship in Owego, New York.
Rick Miller rode in two Individual World Finals during his career. His first World Final appearance came at the Odsal Stadium in 1990 where he finished in 9th place with 7 points from his 5 rides. His second and last World Final came in 1992 at the Olympic Stadium in Wrocław, Poland where he finished a disappointing 11th after scoring 6 points.
Miller rode in the United Kingdom for the Coventry Bees from 1983[4] to 1992, and was honoured with a testimonial in 1992. The Bees won two league titles in 1987 and 1988, going undefeated in the 1987 season, a feat never done before or since. Miller also rode for the Örnarna Eagles in Mariestad, Sweden, and helped them in winning the 1992 Elitserien Championship. He also rode for Polish 2nd Division club Polonia Bydgoszcz.
Miller retired from speedway at the end of the 1992 season and started a new career as a stuntman.[2]