| # | Driver | Team | Championships | Career wins | FIA Category | Racer Rating |
|---|---|---|---|---|---|---|
| 1 | Tonis Kasemets | Wulver Racing | 1 | 7 | Silver | 4,209 |
| 2 | Bruce Hamilton | Wulver Racing | 0 | 2 | Bronze | 3,791 |
| 3 | Anthony Lazzaro | Sean Creech Motorsport | 0 | 2 | Bronze | 3,716 |
| 4 | Nigel Greensall | Sean Creech Motorsport | 0 | 1 | Bronze | 3,690 |
| 5 | Lance Willsey | Sean Creech Motorsport | 0 | 8 | Bronze | 3,597 |
| 6 | Terry Olson | Jr III Racing | 0 | 5 | Bronze | 3,407 |
| 7 | Michael Watt | D MOTORSPORTS | 0 | 2 | Bronze | 3,359 |
| 8 | Niclas Jönsson | D MOTORSPORTS | 0 | 2 | Silver | 3,260 |
| 9 | Francesco Melandri | Sean Creech Motorsport | 0 | 3 | Bronze | 3,075 |
| 10 | Danny Kok | Conquest Racing | 1 | 0 | Bronze | 2,865 |
| 11 | Indy Al Miller | One Motorsports | 0 | 0 | Bronze | 2,771 |
| 12 | George Staikos | Conquest Racing | 1 | 0 | Bronze | 2,610 |
| 13 | Robert Iversen | One Motorsports | 0 | 1 | Bronze | 2,107 |
The IMSA Prototype Challenge ran single-seat LMP3 prototype sportscars in multi-class sprint racing, typically in support of the WeatherTech SportsCar Championship. The series is no longer active. Its field held established amateurs and early-career professionals, with a small handful of experienced drivers; the strongest contenders included George Kurtz, Nolan Siegel, and Gar Robinson. The series occupied the middle rung of IMSA's ladder, stronger than IMSA Mazda Prototype Lites and GT4 America but considerably weaker than the WeatherTech championship above it. Drivers typically arrived from IMSA's lower single-seater and club racing pipelines and moved on toward either the WeatherTech championship or international sportscar racing in the World Endurance Championship.