| 2011 | 18 | 7 | 44 | Fuzzy's Vodka/Panther Racing | Dallara / Honda / Firestone | 225.786 | Running | 198 | 0 | $252,805 |
| 2008 | 8 | 17 | 15 | Dreyer & Reinbold Racing | Dallara / Honda / Firestone | 222.101 | 143.466 | 200 | 8 | $311,415 |
| 2007 | 25 | 16 | 15 | A1TeamUSA/DRR | Dallara / Honda / Firestone | 222.826 | Accident | 162 | 0 | $222,805 |
| 2006 | 26 | 14 | 15 | Rahal Letterman Racing Team Argent | Panoz / Honda / Firestone | 224.393 | Accident | 108 | 0 | $224,805 |
| 2004 | 1 | 1 | 15 | Rahal-Letterman Argent/Pioneer | Panoz G Force / Honda / Firestone | 222.024 | 138.518 | 180 | 91 | $1,761,740 |
| 2003 | 11 | 19 | 52 | Red Bull Cheever Racing | Dallara / Chevrolet / Firestone | 226.213 | Running | 199 | 0 | $323,315 |