Jochen Rindt... Died ... Rindt was a German-Austrian racing driver. He is the only driver to posthumously win the Formula One World Drivers' Championship (in 1970), after being killed in practice for the Italian Grand Prix. Away from Formula One Rindt was highly successful in other single-seat formulae, as well as sports car racing. In 1965 he won the 24 Hours of Le Mans race, driving a Ferrari 250LM in partnership with American Masten Gregory.
Bobby Unser won the USAC California 500 Indy Car race on the 2.5-mile paved oval at the Ontario Motor Speedway, Ontario, CA. Johnny Rutherford was second followed by Gordon Johncock, Wally Dallenbach and Tom Bigelow.
Tom Sneva won the CART sanctioned AB Dick Tony Bettenhausen 200 on the Milwaukee Mile in West Allis, WI. Rick Mears finished second followed by Bobby Unser, Johnny Rutherford and Al Unser.
Bobby Allison won the NASCAR Winston Cup Southern 500 over Bill Elliott at the Darlington Raceway, Darlington, SC.