2008
| | American Le Mans Series - LMP2 | | Position: 15 (38 points) | 4 races. 0 wins. 0 pole positions. 0 podiums. 0 fastest laps.
| | Team: Andretti Green Racing | | Car: Acura ARX-01b |
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2007
| | American Le Mans Series - LMP2 | | Position: 7 (98 points) | 12 races. 1 win. 0 pole positions. 3 podiums. 0 fastest laps.
| | Team: Andretti Green Racing | | Car: Acura ARX01 a |
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2006
| | IRL IndyCar Series | | Position: 11 (289 points) | 14 races. 0 wins. 0 pole positions. 0 podiums. 1 fastest lap.
| | Team: Andretti Green Racing | | Car: Dallara IR4 (Honda) |
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2005-06
| | A1GP | | Position: 16 (23 points) | 8 races. 0 wins. 0 pole positions. 0 podiums. 0 fastest laps.
| | Team: U.S.A. | | Car: Lola B05/52 (Zytek) |
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2005
| | IRL IndyCar Series | | Position: 8 (397 points) | 17 races. 1 win. 3 pole positions. 2 podiums. 0 fastest laps.
| | Team: Andretti Green Racing | | Car: Dallara IR2 (Honda) |
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2004
| | IRL IndyCar Series | | Position: 9 (362 points) | 15 races. 0 wins. 0 pole positions. 1 podium. 1 fastest lap.
| | Team: Andretti Green Racing | | Car: Dallara IR2 (Honda) |
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2003
| | IRL IndyCar Series | | Position: 13 (277 points) | 11 races. 1 win. 0 pole positions. 4 podiums. 2 fastest laps.
| | Team: Andretti Green Racing | | Car: Dallara IR2 (Honda) |
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2002
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2001
| | CART FedEx Champ Car World Series | | Position: 22 (28 points) | 20 races. 0 wins. 0 pole positions. 1 podium. 0 fastest laps.
| | Team: Forsythe Racing | | Car: Reynard 01i (Ford) | | Car: Reynard 01i (Cosworth) |
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2000
| | CART FedEx Champ Car World Series | | Position: 18 (26 points) | 6 races. 0 wins. 0 pole positions. 0 podiums. 0 fastest laps.
| | Team: Forsythe Racing, Walker Motorsport, Mo Nunn Racing | | Car: Reynark 2K1 (Honda) | | Car: Reynard 2K1 (Mercedes) | | Car: Reynard 2K1 (Cosworth) |
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1999
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1998
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1997
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1996
| | PPG Indy Car World Series | | Position: 8 (86 points) | 16 races. 0 wins. 0 pole positions. 2 podiums. 0 fastest laps.
| | Team: Team Rahal | | Car: Reynard 961 (Mercedes) |
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1995
| | PPG Indy Car World Series | | Position: 20 (30 points) | 17 races. 0 wins. 1 pole position. 1 podium. 0 fastest laps.
| | Team: Chip Ganassi Racing | | Car: Reynard 951 (Ford XB) |
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1994
| | PPG Indy Car World Series | | Position: 23 (11 points) | 5 races. 0 wins. 0 pole positions. 0 podiums. 0 fastest laps.
| | Team: Copenhagen Racing | | Car: Lola T9400 (Ford XB) |
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1993
| | Firestone Indy Lights Championship | | Position: 1 (212 points) | 12 races. 7 wins. 8 pole positions. 10 podiums. ? fastest laps. | | Team: Tasman Motorsports | | Car: Lola T93/20 (Buick Holden) | | Complete results needed. |
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1992
| | Firestone Indy Lights Championship | | Position: 5 (120 points) | 12 races. 1 win. 0 pole positions. 4 podiums. ? fastest laps. | | Team: Landford Racing | | Car: March 86A (Buick) | | Complete results needed. |
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1991
| | Zerex Saab Pro Series | | Position: 1 (163 points) | 12 races. 4 wins. 2 pole positions. 10 podiums. ? fastest laps. | | Complete results needed. |
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1990
| | Barber Saab Pro Series | | Position: 5 (55 points) | 12 races. 0 wins. 1 pole position. 1 podium. ? fastest laps. | | Complete results needed. |
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