Al Unser
He was the younger brother of racing drivers Jerry and Bobby Unser, and father of Al Unser Jr. He was the second of four men (A. J. Foyt, himself, Rick Mears and Hélio Castroneves) to have won the Indianapolis 500-Mile Race four times (1970, 1971, 1978, 1987). He also won the National Championship in 1970, 1983, and 1985.