| | Heat | Dash | B Feature | A Feature |
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| 4/17/2021 | Park Jefferson International Speedway - Jefferson, SD Lucas Oil ASCS and RACESaver Sioux City Sprint Nationals plus IMCA Modifieds& Stock Cars 360 Sprints - Winged: ASCS National IMCA Modified, IMCA Stock Car, IMCA RaceSaver Sprint Car | Results | | Karl Brewer (IMCA Stock Car) | 1st | - | - | 5th |
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| 5/9/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Series IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Karl Brewer (IMCA Stock Car) | 6th (DNF) | - | - | 10th (DNF) |
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| 5/23/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Series IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Karl Brewer (IMCA Stock Car) | 1st | - | - | 4th |
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| 6/4/2021 | Park Jefferson International Speedway - Jefferson, SD $10,000 to win USMTS Challenge plus Stocks, Sp Mods, Hobbies A Modifieds: USMTS - United States Modified Touring Series B Modifieds, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Karl Brewer (IMCA Stock Car) | 3rd | - | - | 4th |
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| 6/27/2021 | Interstate Speedway (SD) - Jefferson, SD IMCA Weekly Series IMCA Modified: Midwest Madness Tour IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Karl Brewer (IMCA Northern SportMod) | 1st | - | - | 2nd | | Karl Brewer (IMCA Stock Car) | 4th | - | - | DNS |
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| 7/4/2021 | Interstate Speedway (SD) - Jefferson, SD 4th of July Racing IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Karl Brewer (IMCA Northern SportMod) | 1st | - | - | 12th (DNF) |
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| 7/26/2021 | Park Jefferson International Speedway - Jefferson, SD $1,000 to win IMCA Fast Shafts Qualifier at Park Jefferson B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Karl Brewer (IMCA Stock Car) | 5th | - | - | 15th (DNF) |
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