2013 Season
| 27-Jan | Daytona |
| 2-Mar | COTA |
| 6-Apr | Birmingham |
| 20-Apr | Road Atlanta |
| 1-Jun | Detroit |
| 15-Jun | Mid Ohio |
| 30-Jun | Watkins Glen |
| 26-Jul | Indianapolis |
| 10-Aug | Road America |
| 17-Aug | Kansas |
| 8-Sep | Laguna Seca |
| 28-Sep | Lime Rock |
Standings
| Alessandro Balzan | 341 |
| Andy Lally | 331 |
| John Potter | 331 |
| John Edwards | 330 |
| Robin Liddell | 330 |
| Emil Assentato | 317 |
| Anthony Lazzaro | 317 |
| Patrick Lindsey | 303 |
| Patrick Long | 303 |
| Paul Dalla Lana | 299 |
| Jeff Segal | 293 |
| Eric Curren | 277 |
| Leh Keen | 277 |
| Boris Said | 242 |
| Bill Auberlen | 239 |
Race Winners
| John Edwards | 4 |
| Robin Liddell | 4 |
| Bill Auberlen | 3 |
| Paul Dalla Lana | 3 |
| Lawson Aschenbach | 1 |
| Alessandro Balzan | 1 |
| Eric Curren | 1 |
| Oliver Jarvis | 1 |
| Billy Johnson | 1 |
| Leh Keen | 1 |
| Andy Lally | 1 |
| Edoardo Mortara | 1 |
| Max Papis | 1 |
| John Potter | 1 |
| Boris Said | 1 |
| Jeff Segal | 1 |
| Dion von Moltke | 1 |
Pole Positions
| John Edwards | 3 |
| Lawson Aschenbach | 1 |
| Alessandro Balzan | 1 |
| Leh Keen | 1 |
| Robin Liddell | 1 |
| Max Papis | 1 |
| Boris Said | 1 |
| Alex Tagliani | 1 |
| Nick Tandy | 1 |
