| # | Driver | Team | Championships | Career wins | FIA Category | Racer Rating |
|---|---|---|---|---|---|---|
| 1 | Kenton Koch | One Motorsports | 2 | 37 | Gold | 5,209 |
| 2 | Ugo De Wilde | Muehlner Motorsports America | 0 | 9 | Silver | 5,181 |
| 3 | Dan Goldburg | Performance Tech Motorsports | 0 | 7 | Bronze | 4,903 |
| 4 | Rasmus Lindh | Performance Tech Motorsports | 0 | 6 | Silver | 4,835 |
| 5 | Naveen Rao | WIN Autosport | 1 | 3 | Bronze | 4,743 |
| 6 | Tyler Maxson | MLT Motorsports | 1 | 13 | Silver | 4,706 |
| 7 | Alan Brynjolfsson | VOLT Racing with Archangel | 1 | 4 | Bronze | 4,608 |
| 8 | Laurents Hoerr | Muehlner Motorsports America | 0 | 1 | Silver | 4,538 |
| 9 | Jacob Eidson | O'Gara Motorsport / USRT | 0 | 5 | Silver | 4,469 |
| 10 | Stevan McAleer | Robillard Racing | 1 | 15 | Gold | 4,361 |
| 11 | Trent Hindman | VOLT Racing with Archangel | 2 | 18 | Gold | 4,246 |
| 12 | Scott Huffaker | CT motorsports LLC | 0 | 5 | Silver | 4,232 |
| 13 | Tonis Kasemets | Wulver Racing | 1 | 7 | Silver | 4,209 |
| 14 | Mike Skeen | Jr III Racing | 1 | 23 | Silver | 4,190 |
| 15 | Moritz Kranz | Muehlner Motorsports America | 5 | 40 | Silver | 4,156 |
| 16 | Matthew Bell | WIN Autosport | 2 | 13 | Gold | 4,115 |
| 17 | Dakota Dickerson | MLT Motorsports | 2 | 13 | Silver | 4,068 |
| 18 | Garett Grist | Jr III Racing | 0 | 8 | Gold | 3,994 |
| 19 | Jarett Andretti | Andretti Autosport | 0 | 2 | Silver | 3,852 |
| 20 | Steven Thomas | WIN Autosport | 1 | 22 | Bronze | 3,852 |
| 21 | Bruce Hamilton | Wulver Racing | 0 | 2 | Bronze | 3,791 |
| 22 | CR Crews | Muehlner Motorsports America | 0 | 1 | Bronze | 3,737 |
| 23 | Joe Robillard | Robillard Racing | 0 | 0 | Bronze | 3,613 |
| 24 | Peter Ludwig | Conquest Racing / JMF Motorsports | 0 | 1 | Bronze | 3,519 |
| 25 | Josh Sarchet | MLT Motorsports | 1 | 1 | Bronze | 3,502 |
| 26 | Antoine Comeau | Conquest Racing / JMF Motorsports | 0 | 1 | Bronze | 3,440 |
| 27 | Terry Olson | Jr III Racing | 0 | 5 | Bronze | 3,407 |
| 28 | Aristotle Balogh | Jr III Racing | 0 | 3 | Bronze | 3,351 |
| 29 | David Grant | JDC MotorSports | 0 | 0 | Bronze | 3,223 |
| 30 | Jon Brownson | Forty7 Motorsports | 0 | 1 | Bronze | 3,187 |
| 31 | Brian Thienes | US RaceTronics | 0 | 1 | Bronze | 3,173 |
| 32 | Mel Johnson | One Motorsports | 0 | 0 | Bronze | 3,168 |
| 33 | Steve Scullen | CT Motorsports LLC | 0 | 0 | Bronze | 3,160 |
| 34 | Courtney Crone | Forty7 Motorsports | 0 | 0 | Silver | 3,150 |
| 35 | Natasha Balogh | Jr III Racing | 0 | 0 | Silver | 3,147 |
| 36 | Colin Mullan | Conquest Racing / JMF Motorsports | 0 | 1 | Silver | 3,146 |
| 37 | Keith Grant | JDC MotorSports | 0 | 8 | Bronze | 3,032 |
| 38 | Jason Rabe | Forty7 Motorsports | 0 | 1 | Bronze | 3,003 |
| 39 | Eric Palmer | Jr III Racing | 0 | 0 | Silver | 2,970 |
| 40 | Ken D'Arcy | Jr III Racing | 0 | 0 | Bronze | 2,887 |
| 41 | Greg Palmer | Jr III Racing | 0 | 0 | Bronze | 2,828 |
| 42 | Dario Cangialosi | Forty7 Motorsports | 0 | 0 | Silver | 2,796 |
| 43 | Indy Al Miller | One Motorsports | 0 | 0 | Bronze | 2,771 |
| 44 | James French | Conquest Racing / JMF Motorsports | 1 | 24 | Silver | 2,749 |
| 45 | Tristan Herbert | Andretti Autosport | 0 | 5 | Bronze | 2,360 |
| 46 | Marc Sharinn | Jr III Racing | 0 | 0 | Bronze | 2,332 |
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.