Louis Chevrolet won the AAA Empire City Race on the 1-mile dirt oval Empire City Speedway in Yonkers, NY.
Dario Resta won the AAA 500-mile Chicago Race on the 2-mile board oval Speedway Park in Maywood, IL.
Don Branson and Parnelli Jones won the USAC Twin 50 Sprint Car races at the Milwaukee Mile in West Allis, WI.
Mario Andretti won the USAC 300-mile Atlanta 300 race on the 1.5-mile paved oval Atlanta International Raceway in Hampton, GA. Billy Foster was second followed by Gordon Johncock, Chuck Hulse and Al Smith.
Tom Sneva won the Schaefer 500 USAC Championship race on the 2.5-mile paved oval Pocono International Raceway, Long Pond, PA. Mario Andretti was second followed by Gordon Johncock, Wally Dallenbach and Johnny Rutherford.
Rusty Wallace won the NASCAR Winston Cup Miller 400 over Bill Elliott at the Michigan International Speedway, Brooklyn, MI.