1996
64th 24 Hours of Le Mans LMP1 class
3rd
1995
63rd 24 Hours of Le Mans WSC class
1st
1985
USAC Gold Crown Championship
2nd
1984
PPG Indy Car World Series
1st
1983
PPG Indy Car World Series
3rd
1983
Le Mans 24h - C class
3rd
1982
PPG Indy Car World Series
3rd
1979
International Race Of Champions
1st
1979
Formula 1 Race of Champions
3rd
1978
Formula One - World Championship for Drivers
1st
1978
International Race Of Champions
2nd
1977
Formula One - World Championship of Drivers
3rd
1976
International Race Of Champions
2nd
1975
Formula 1 Daily Express International Trophy
3rd
1975
SCCA/USAC F5000 Championship
2nd
1975
World Championship for Makes Watkins Glen 6 Hours
2nd
1974
SCCA/USAC F5000 Championship
2nd
1974
USAC National Silver Crown
1st
1974
World Championship for Makes 1000 km Monza
1st
1973
USAC National Silver Crown
2nd
1972
World Championship for Makes 12 Hours of Endurance Sebring
1st
1972
World Championship for Makes 6 Hours of The Glen
1st
1972
World Championship for Makes Daytona 6 Hours
1st
1972
World Championship for Makes - BOAC Brands Hatch 1000 Kilometres
1st
1971
Formula 1 Questor Grand Prix
1st
1969
USAC National Championship
1st
1968
USAC National Championship
2nd
1967
USAC National Championship
2nd
1966
USAC National Championship
1st
1966
USAC National Sprint Car Series
2nd
1965
USAC National Championship
1st
1964
USAC National Sprint Car Series
3rd