Earl Cooper won the AAA sanctioned Chicago Auto Club Trophy Race over Gil Anderson and Barney Oldfield on the 8.384 Mile Elgin Road Race Course, Elgin, IL.
Jimmy Bryan won the AAA sanctioned Springfield 100 on the 1-mile dirt oval Illinois State Fairgrounds in Springfield, IL. Bob Sweikert finished second followed by Andy Linden, George Amick and Jiggs Peters.
Lloyd Ruby won the USAC sanctioned Milwaukee 200 on the Milwaukee Mile in West Allis, WI. Len Sutton finished second followed by A.J. Foyt, Dick Rathmann and Eddie Sachs. (Click here for the race report.)
Danny Sullivan won the Pocono 500 CART Championship race on the 2.5-mile paved oval Pocono International Raceway, Long Pond, PA. Rick Mears was second followed by Michael Andretti, Teo Fabi and Mario Andretti.
Rusty Wallace won the NASCAR Winston Cup Champion 400 over Morgan Shepherd at the Michigan International Speedway, Brooklyn, MI.