| Season | Series | Pos | Team | Car |
| 1981 | SCCA National Championship Runoffs Formula F | 8th | | Van Diemen RF81 |
| 1982 | Robert Bosch/VW Super Vee Championship | 1st | Arciero Racing | Ralt-Volkswagen RT5/81Ralt-Volkswagen RT5/82 |
| | SCCA National Championship Runoffs Formula F | 3rd | | Lola T640 |
| 1983 | Formula Mondial North American Cup | 1st | Conte Racing | Ralt-Ford RT4 |
| | 24 Heures du Mans | 3rd | Kremer Racing | Porsche 956 |
| | Robert Bosch/VW Super Vee Championship | 18th | | Ralt-Volkswagen RT5/82 |
| | FIA World Endurance Championship | 25th | Kremer Racing | Porsche 956 |
| | PPG Indy Car World Series | 27th | Kraco Racing | March-Cosworth 83C |
| | European Endurance Championship | 28th | Kremer Racing | Porsche 956 |
| 1983/4 | USAC Gold Crown Series | 5th | Kraco Racing | March-Cosworth 84C |
| 1984 | PPG Indy Car World Series | 7th | Kraco Racing | March-Cosworth 83C |
| 1985 | USAC Gold Crown Series | 8th | Kraco Racing | March-Cosworth 84C |
| | PPG Indy Car World Series | 9th | Kraco Racing | March-Cosworth 85C |
| 1986 | PPG Indy Car World Series | 2nd | Kraco Racing | March-Cosworth 86C |
| | USAC Gold Crown Series | 6th | Kraco Racing | March-Cosworth 86C |
| 1987 | PPG Indy Car World Series | 2nd | Kraco Racing | March-Cosworth 87C |
| | International Race of Champions | 7th | | Chevrolet Camaro |
| | USAC Gold Crown Series | 29th | Kraco Racing | March-Cosworth 87C |
| | World Touring Car Championship | 38th | Alfa Corse | Alfa Romeo 75 Turbo |
| | Camel GTP Championship | 40th | Conte RacingHendrick Motorsport | March-Buick 86GChevrolet Corvette GTP |
| 1988 | Marlboro Challenge | 1st | Kraco Racing | Lola-Cosworth T88/00 |
| | USAC Gold Crown Series | 4th | Kraco Racing | March-Cosworth 88C |
| | PPG Indy Car World Series | 6th | Kraco Racing | March-Cosworth 88CLola-Cosworth T88/00 |
| | World Sports Prototype Championship for Drivers | 44th | Porsche AG | Porsche 962C |
| 1989 | PPG Indy Car World Series | 3rd | Newman/Haas Racing | Lola-Chevrolet T89/00 |
| | USAC Gold Crown Series | 17th | Newman/Haas Racing | Lola-Chevrolet T89/00 |
| 1990 | PPG Indy Car World Series | 2nd | Newman/Haas Racing | Lola-Chevrolet T90/00 |
| | USAC Gold Crown Series | 20th | Newman/Haas Racing | Lola-Chevrolet T90/00 |
| 1991 | PPG Indy Car World Series | 1st | Newman/Haas Racing | Lola-Chevrolet T91/00 |
| | Marlboro Challenge | 1st | Newman/Haas Racing | Lola-Chevrolet T91/00 |
| | USAC Gold Crown Series | 2nd | Newman/Haas Racing | Lola-Chevrolet T91/00 |
| | Camel GTP Championship | 29th | Jochen Dauer Racing | Porsche 962C |
| 1992 | PPG Indy Car World Series | 2nd | Newman/Haas Racing | Lola-Ford T91/00Lola-Ford T92/00 |
| | Marlboro Challenge | 2nd | Newman/Haas Racing | Lola-Ford T92/00 |
| | USAC Gold Crown Series | 13th | Newman/Haas Racing | Lola-Ford T92/00 |
| 1993 | FIA Formula One World Championship | 11th | Marlboro McLaren | McLaren-Ford MP4/8 |
| 1994 | PPG Indy Car World Series | 4th | Target Chip Ganassi Racing | Reynard-Ford 94I |
| | USAC Gold Crown Series | 6th | Target Chip Ganassi Racing | Reynard-Ford 94I |
| 1995 | PPG Indy Car World Series | 4th | Newman/Haas Racing | Lola-Ford T95/00 |
| | USAC Gold Crown Series | 25th | Newman/Haas Racing | Lola-Ford T95/00 |
| 1996 | PPG Indy Car World Series | 2nd | Newman/Haas Racing | Lola-Ford T96/00 |
| 1997 | PPG CART World Series | 8th | Newman/Haas Racing | Swift-Ford 007i |
| 1998 | FedEx Championship Series | 7th | Newman/Haas Racing | Swift-Ford 009.c |
| 1999 | FedEx Championship Series | 4th | Newman/Haas Racing | Swift-Ford 010.c |
| 2000 | FedEx Championship Series | 8th | Newman/Haas Racing | Lola-Ford B2K/00 |
| 2001 | FedEx Championship Series | 3rd | Team Green | Reynard-Honda 01i |
| | Indy Racing Northern Lights Series | 34th | Team Green | Dallara-Oldsmobile IR1 |
| 2002 | FedEx Championship Series | 9th | Team Motorola | Reynard-Honda 02iLola-Honda B2/00 |
| | Firestone Indy Racing League | 38th | Team Green | Dallara-Chevrolet IR2 |