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| 20 – Justin MacDuff |
| Nickname: J-Mac |
| Hometown: Hudson Falls, NY |
| Birthday: October 27, 1995 |
| Team: 4x Motorsports |
| Sponsor: Cerebral Palsy Foundation |
|
| Late Model Pro Series |
| Season Stats |
| Year | Pts | Starts | Wins | Top 5 | Top 10 | Pts | Bns | Pen | Led | Inc |
| 2024 | 30 | 2 | 0 | 0 | 2 | 256 | 0 | 0 | 0 | 0 |
| 2022 | 5 | 10 | 0 | 5 | 7 | 1302 | 0 | 0 | 0 | 48 |
| 2021 | 7 | 10 | 0 | 3 | 9 | 1332 | 0 | 0 | 0 | 49 |
| 2020 | 10 | 11 | 0 | 2 | 4 | 1100 | 6 | -10 | 0 | 62 |
| 2019 | 6 | 16 | 1 | 8 | 9 | 1321 | 12 | -6 | 208 | 52 |
| 2018 | 10 | 14 | 1 | 8 | 10 | 1132 | 20 | -36 | 212 | 46 |
| 2017 | 15 | 13 | 0 | 0 | 7 | 380 | 3 | -3 | 0 | 64 |
| 2016 | 10 | 16 | 0 | 2 | 5 | 1151 | 6 | -5 | 4 | 71 |
| 2015 | 9 | 12 | 0 | 0 | 1 | 5088 | 9 | -5 | 0 | 89 |
| Dirt Pro Series |
| Season Stats |
| Year | Pts | Starts | Wins | Top 5 | Top 10 | Pts | Bns | Pen | Led | Inc |
| 2024 | 32 | 2 | 0 | 0 | 1 | 254 | 0 | 0 | 0 | 8 |
| 2021 | 31 | 5 | 0 | 0 | 1 | 572 | 0 | 0 | 4 | 22 |
| 2021 | 7 | 8 | 1 | 2 | 6 | 662 | 0 | 0 | 7 | 44 |
| 2020 | 6 | 11 | 1 | 5 | 7 | 677 | 16 | 0 | 56 | 36 |
| 2019 | 19 | 5 | 0 | 2 | 3 | 338 | 10 | 0 | 0 | 12 |
| Big Blocks |
| Race Results |
| Date | Race | Str | Fin | Int | Laps | Led | Inc | Pts | Bns | Pen | Total | Status |
| 01/3/2023 | ?E_ID=322’>Sponsorship | 22 | 11 | -3.740 | 40 | 0 | 6 | 124 | 0 | 0 | 124 | Running |
| 02/28/2024 | ?E_ID=330’>Sponsorship Avail | 15 | 8 | -3.535 | 35 | 0 | 2 | 130 | 0 | 0 | 130 | Running |
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