| | Heat | Dash | B Feature | A Feature |
|---|
|
|---|
| 4/29/2023 | Park Jefferson International Speedway - Jefferson, SD Opening Night B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 1st | - | - | 8th |
|
| 5/21/2023 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Racing plus Tri-State Late Models Dirt Late Models: Tri-State Late Models Dirt Super Late Models, B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 6th | - | - | 10th (DNF) |
|
| 5/29/2023 | Park Jefferson International Speedway - Jefferson, SD $5,000 to win RTI Nationals (Monday) Memorial Day A Modifieds, B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 7th | - | - | 19th |
|
| 5/30/2023 | Park Jefferson International Speedway - Jefferson, SD $5,000 to win RTI Nationals (Tuesday) A Modifieds, B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 3rd | - | - | 11th |
|
| 6/4/2023 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Racing B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 3rd | - | - | 8th |
|
| 6/18/2023 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Racing plus GOTRA Vintage Races B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 4th | - | - | 14th (DNF) |
|
| 6/27/2023 | Park Jefferson International Speedway - Jefferson, SD Midwest Madness Tour (Tuesday) IMCA Modified: Midwest Madness Tour A Modifieds, B Modifieds, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 6th | - | 7th | - |
|
| 7/24/2023 | Park Jefferson International Speedway - Jefferson, SD Dave Riley Memorial Race $2556 to win Hobby Stock, $1056 Sp Mod,$1056 Stock car,$1056 Mods, $556 Com A Modifieds, B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 4th | - | - | 16th (DNF) |
|
| 8/10/2023 | Park Jefferson International Speedway - Jefferson, SD Practice Dirt Super Late Models, B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | - | - | - | - |
|
| 8/12/2023 | Park Jefferson International Speedway - Jefferson, SD Late Models & $1000 win stock cars Dirt Late Models: Tri-State Late Models Dirt Super Late Models, B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 5th | - | - | 7th |
|
| 9/24/2023 | Interstate Speedway (SD) - Jefferson, SD 53rd Annual Interstate Speedway Season Championships B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 1st | - | - | 9th (DNF) |
|
| 10/21/2023 | Park Jefferson International Speedway - Jefferson, SD Charlie Clark Memorial $5022 to win! A Modifieds, B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 7th | - | 6th | - |
|