Ronnie Bucknum was a Formula One driver who participated in 11 Grands Prix, debuting on August 2, 1964 driving for Honda. After Formula One, Bucknum drove in the USAC Championship Car series, racing between 1967-1970 with 23 starts. He had one win, the 1968 Michigan 500. He also drove a Carroll Shelby GT40 to third place at Le Mans in 1966. He died from complications from diabetes.
Ronnie Bucknum died 29 years ago, he was 56 , He would have been 85.
The only American-born driver to win the Formula One World Drivers' Championship (Mario Andretti, an Italian American driver, won the World Drivers' Championship in 1978, but was not born in the United States). He also scored three wins at each of the 24 Hours of Le Mans and 12 Hours of Sebring sports car races.