Mid-American Motocross October 8 1972Mid-American MotocrossSt Peters, MO 500MX Results Results Home 1972 Results Mid-American Motocross Live & On-Demand Learn More * all times Check back for a full broadcast schedule closer to the race. 1972500MXFull Results BradLackey1st GaryJones2nd RichThorwaldson3rd