| # | Driver | Team | Championships | Career wins | FIA Category | Racer Rating |
|---|---|---|---|---|---|---|
| 1 | George Kurtz | Crowdstrike Racing by D Motorsports | 3 | 21 | Bronze | 5,675 |
| 2 | Nolan Siegel | Jr III Racing | 0 | 10 | Gold | 5,386 |
| 3 | Gar Robinson | Riley Motorsports | 3 | 15 | Silver | 5,339 |
| 4 | Memo Gidley | JDC MotorSports | 1 | 28 | Bronze | 4,914 |
| 5 | Dan Goldburg | Performance Tech Motorsports | 0 | 7 | Bronze | 4,807 |
| 6 | Seb Priaulx | Sean Creech Motorsport | 1 | 15 | Gold | 4,787 |
| 7 | Danny Formal | CT Motorsports LLC | 3 | 39 | Silver | 4,740 |
| 8 | Kaz Grala | Ave Motorsports with GRS | 0 | 7 | Silver | 4,703 |
| 9 | Parker Thompson | Sean Creech Motorsport | 1 | 18 | Silver | 4,529 |
| 10 | Riley Dickinson | Muehlner Motorsports America | 2 | 17 | Silver | 4,505 |
| 11 | Tyler Maxson | MLT Motorsports | 0 | 10 | Silver | 4,463 |
| 12 | Oscar Tunjo | Muehlner Motorsports America | 0 | 14 | Silver | 4,457 |
| 13 | Stevan McAleer | Robillard Racing | 0 | 15 | Gold | 4,326 |
| 14 | Orey Fidani | AWA | 0 | 2 | Bronze | 4,251 |
| 15 | Jonathan Bennett | Crowdstrike Racing by D Motorsports | 1 | 7 | Bronze | 4,247 |
| 16 | Dillon Machavern | Muehlner Motorsports America | 1 | 9 | Silver | 4,244 |
| 17 | Efrin Castro | Muehlner Motorsports America | 2 | 26 | Bronze | 4,239 |
| 18 | Scott Huffaker | CT motorsports LLC | 0 | 5 | Silver | 4,233 |
| 19 | Tonis Kasemets | Wulver Racing | 1 | 8 | Silver | 4,201 |
| 20 | Shane Lewis | Riley Motorsports | 0 | 6 | Bronze | 4,191 |
| 21 | Stephen Simpson | JDC MotorSports | 0 | 3 | Silver | 4,145 |
| 22 | Dakota Dickerson | MLT Motorsports | 1 | 13 | Silver | 4,071 |
| 23 | Anthony Mantella | AWA | 0 | 2 | Bronze | 3,971 |
| 24 | Corey Lewis | MLT Motorsports | 1 | 12 | Silver | 3,837 |
| 25 | Bruce Hamilton | Wulver Racing | 0 | 2 | Bronze | 3,810 |
| 26 | Gerry Kraut | JDC MotorSports | 0 | 2 | Bronze | 3,733 |
| 27 | Aristotle Balogh | Jr III Racing | 0 | 3 | Bronze | 3,717 |
| 28 | Joe Robillard | Robillard Racing | 0 | 0 | Bronze | 3,613 |
| 29 | Lance Willsey | Sean Creech Motorsport | 0 | 8 | Bronze | 3,599 |
| 30 | Alexander Koreiba | JDC MotorSports | 0 | 4 | Silver | 3,566 |
| 31 | Josh Sarchet | MLT Motorsports | 0 | 1 | Bronze | 3,509 |
| 32 | Mark Kvamme | Muehlner Motorsports America | 2 | 18 | Bronze | 3,509 |
| 33 | Alex Popow | Muehlner Motorsports America | 1 | 4 | Silver | 3,461 |
| 34 | Antoine Comeau | Conquest Racing / JMF Motorsports | 0 | 1 | Bronze | 3,444 |
| 35 | Christopher Allen | Performance Tech Motorsports | 0 | 15 | Silver | 3,418 |
| 36 | Terry Olson | Jr III Racing | 1 | 5 | Bronze | 3,407 |
| 37 | Niclas Jönsson | D MOTORSPORTS | 0 | 2 | Silver | 3,374 |
| 38 | Michael Watt | D MOTORSPORTS | 0 | 2 | Bronze | 3,359 |
| 39 | Thomas Merrill | Jr III Racing | 1 | 12 | Silver | 3,322 |
| 40 | Patrick Kujala | US RaceTronics | 0 | 5 | Gold | 3,271 |
| 41 | Courtney Crone | Forty7 Motorsports | 0 | 0 | Silver | 3,241 |
| 42 | David Grant | JDC MotorSports | 0 | 0 | Bronze | 3,235 |
| 43 | Oscar Bitar | Performance Tech Motorsports | 0 | 0 | Silver | 3,235 |
| 44 | Jon Brownson | Forty7 Motorsports | 0 | 1 | Bronze | 3,189 |
| 45 | Steve Scullen | CT Motorsports LLC | 0 | 0 | Bronze | 3,160 |
| 46 | Keith Grant | JDC MotorSports | 0 | 8 | Bronze | 3,098 |
| 47 | Brian Thienes | US RaceTronics | 0 | 1 | Bronze | 3,088 |
| 48 | Jason Rabe | Forty7 Motorsports | 0 | 1 | Bronze | 2,988 |
| 49 | John Saurino | OPHANIM MOTORSPORTS | 0 | 0 | Bronze | 2,935 |
| 50 | Josh Saurino | OPHANIM MOTORSPORTS | 0 | 0 | Silver | 2,819 |
| 51 | Dario Cangialosi | Forty7 Motorsports | 0 | 0 | Silver | 2,796 |
| 52 | Robert Mau | Performance Tech Motorsports | 0 | 1 | Bronze | 2,728 |
| 53 | Tony Ave | Ave Motorsports with GRS | 0 | 18 | Bronze | 2,669 |
| 54 | Hans Saurino | OPHANIM MOTORSPORTS | 0 | 0 | Silver | 2,657 |
| 55 | Nigel Saurino | OPHANIM MOTORSPORTS | 0 | 0 | Silver | 2,655 |
| 56 | George Staikos | Conquest Racing | 1 | 0 | Bronze | 2,611 |
| 57 | Hanna Zellers | Ave Motorsports with GRS | 0 | 0 | Silver | 2,370 |
The IMSA Prototype Challenge was a single-seat prototype series that raced LMP3 sportscars in support of the WeatherTech SportsCar Championship. The series ran multiple classes of identical or near-identical machinery and fielded a professional field with a substantial amateur contingent; Bronze-graded drivers outnumbered Silvers, and Golds were sparse. Drivers like George Kurtz and Nolan Siegel established themselves here before moving to the top IMSA ranks. The series sat between IMSA Mazda Prototype Lites and the full WeatherTech grid on the professional pyramid, serving as a critical step upward for young talent from club racing and lower-level series. Most drivers arrived from Mazda Prototype Lites or Pilot Challenge and moved on to WeatherTech or international endurance racing; some stepped sideways to GT4 America instead. The series is no longer active.