| Marco Andretti (USA) |
 |
Andretti Green Racing |
| Townsend Bell (USA) |
 |
Dreyer & Reinbold Racing |
| Enrique Bernoldi (BRA) |
 |
Conquest Racing |
| Ryan Briscoe (AUS) |
 |
Team Penske |
| Ed Carpenter (USA) |
 |
Vision Racing |
| Helio Castroneves (BRA) |
 |
Team Penske |
| Scott Dixon (NZL) |
 |
Target Chip Ganassi Racing |
| Milka Duno (VEN) |
 |
Dreyer & Reinbold Racing |
| A.J. Foyt IV (USA) |
 |
Vision Racing |
| Jay Howard (UK) |
 |
Roth Racing |
| Ryan Hunter-Reay (USA) |
 |
Rahal-Letterman Racing |
| Bruno Junqueira (BRA) |
 |
Dale Coyne Racing |
| Tony Kanaan (BRA) |
 |
Andretti Green Racing |
| Alex Lloyd (UK) |
 |
Target Chip Ganassi Racing |
| Darren Manning (USA) |
 |
A.J. Foyt Enterprises |
| Vitor Meira (BRA) |
 |
Panther Racing |
| Mario Moraes (BRA) |
 |
Dale Coyne Racing |
| Hideki Mutoh (JAP) |
 |
Andretti Green Racing |
| Danica Patrick (USA) |
 |
Andretti Green Racing |
| Frank Perera (UK) |
 |
Target Chip Ganassi Racing |
| Will Power (AUS) |
 |
Target Chip Ganassi Racing |
| Frank Perera (UK) |
|
KV Racing Technology |
| Graham Rahal (USA) |
 |
Newman/Haas/Lanigan Racing |
| Buddy Rice (USA) |
 |
Dreyer & Reinbold Racing |
| Marty Roth (CAN) |
 |
Roth Racing |
| Tomas Sheckter (RSA) |
 |
Luczo Dragon Racing |
| Oriol Servia (SPA) |
 |
KV Racing Technology |
| Ernesto Viso (VEN) |
 |
HVM Racing |
| Dan Wheldon (UK) |
 |
HVM Racing |
| Justin Wilson (UK) |
 |
Newman/Haas/Lanigan Racing |