| 1 | 2021 | Barber Motorsports Park | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 15 | 15 |
| 2 | 2021 | Barber Motorsports Park | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 14 | 11 |
| 3 | 2021 | Streets of St. Petersburg | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 10 | 13 |
| 4 | 2021 | Streets of St. Petersburg | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 13 | 16 |
| 5 | 2021 | Indianapolis Grand Prix Circuit | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 12 | 8 |
| 6 | 2021 | Indianapolis Grand Prix Circuit | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 12 | 10 |
| 7 | 2021 | Indianapolis Grand Prix Circuit | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 12 | 11 |
| 8 | 2021 | Lucas Oil Raceway | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 5 | 11 |
| 9 | 2021 | Road America | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 7 | 6 |
| 10 | 2021 | Road America | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 12 | 10 |
| 11 | 2021 | Mid-Ohio Sports Car Course | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 11 | 8 |
| 12 | 2021 | Mid-Ohio Sports Car Course | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 10 | 11 |
| 13 | 2021 | World Wide Technology Raceway | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 1 | 4 |
| 14 | 2021 | New Jersey Motorsports Park | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 4 | 6 |
| 15 | 2021 | New Jersey Motorsports Park | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 8 | 10 |
| 16 | 2021 | New Jersey Motorsports Park | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 10 | 4 |
| 17 | 2021 | Mid-Ohio Sports Car Course | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 12 | 11 |
| 18 | 2021 | Mid-Ohio Sports Car Course | 3 | Turn 3 Motorsport | Tatuus PM-18 | Mazda MZR-PM18A | 6 | 1 |
