| 1 | 2018 | St. Petersburg | 91 | Exclusive Autosport | Tatuus PM-18 | Mazda MZR-PM18A | 15 | 11 |
| 2 | 2018 | St. Petersburg | 91 | Exclusive Autosport | Tatuus PM-18 | Mazda MZR-PM18A | 14 | 13 |
| 3 | 2018 | Barber | 91 | Exclusive Autosport | Tatuus PM-18 | | 15 | 16 |
| 4 | 2018 | Barber | 91 | Exclusive Autosport | Tatuus PM-18 | | 15 | 15 |
| 5 | 2018 | Indianapolis | 91 | Exclusive Autosport | Tatuus PM-18 | | 13 | 9 |
| 6 | 2018 | Indianapolis | 91 | Exclusive Autosport | Tatuus PM-18 | | 13 | 11 |
| 7 | 2018 | O'Reilly | 91 | Exclusive Autosport | Tatuus PM-18 | Mazda MZR-PM18A | 10 | 8 |
| 8 | 2018 | Road America | 91 | Exclusive Autosport | Tatuus PM-18 | | 13 | 13 |
| 9 | 2018 | Road America | 91 | Exclusive Autosport | Tatuus PM-18 | | 13 | 12 |
| 10 | 2018 | Toronto | 91 | Exclusive Autosport | Tatuus PM-18 | | 11 | 11 |
| 11 | 2019 | St. Petersburg | 11 | Pserra Racing/Jay Howard Driver Development | Tatuus PM-18 | Mazda MZR-PM18A | 9 | 7 |
| 12 | 2019 | St. Petersburg | 11 | Pserra Racing/Jay Howard Driver Development | Tatuus PM-18 | Mazda MZR-PM18A | 10 | 13 |
| 13 | 2019 | Indianapolis | 11 | Pserra Racing/Jay Howard Driver Development | Tatuus PM-18 | Mazda MZR-PM18A | 13 | 9 |
| 14 | 2019 | Indianapolis | 11 | Pserra Racing/Jay Howard Driver Development | Tatuus PM-18 | Mazda MZR-PM18A | 11 | 9 |
| 15 | 2019 | O'Reilly | 11 | Pserra Racing/Jay Howard Driver Development | Tatuus PM-18 | Mazda MZR-PM18A | 10 | 12 |
| 16 | 2019 | Road America | 11 | Pserra Racing/Jay Howard Driver Development | Tatuus PM-18 | Mazda MZR-PM18A | 12 | 8 |
| 17 | 2019 | Toronto | 11 | Pserra Racing/Jay Howard Driver Development | Tatuus PM-18 | Mazda MZR-PM18A | 9 | 4 |
| 18 | 2019 | Toronto | 11 | Pserra Racing/Jay Howard Driver Development | Tatuus PM-18 | Mazda MZR-PM18A | 8 | 13 |
| 19 | 2019 | Mid-Ohio | 11 | Pserra Racing/Jay Howard Driver Development | Tatuus PM-18 | Mazda MZR-PM18A | 13 | 7 |
| 20 | 2019 | Mid-Ohio | 11 | Pserra Racing/Jay Howard Driver Development | Tatuus PM-18 | Mazda MZR-PM18A | 12 | 9 |
