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| 6/24/2021 | Princeton Speedway - Princeton, MN Siercks Memorial Hobby Stocks, A Modifieds, B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car | Results | | Tim Siercks (IMCA Stock Car) | 9th | - | 10th | - |
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| 6/25/2021 | North Central Speedway - Brainerd, MN 10000 lakes 10k A Modifieds, B Modifieds, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car | Results | | Tim Siercks (IMCA Stock Car) | 9th (DNF) | - | 14th | - |
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| 6/26/2021 | North Central Speedway - Brainerd, MN 10000 lakes 10k IMCA Modified: Land of Ten Thousand Lakes 10K A Modifieds, B Modifieds, IMCA Northern SportMod, IMCA Stock Car | Results | | Tim Siercks (IMCA Stock Car) | 6th | - | 13th (DNF) | - |
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| 7/9/2021 | Princeton Speedway - Princeton, MN Weekly races Vintage Modifieds: Northern Vintage Stockcar Racers Hobby Stocks, A Modifieds, B Modifieds, Vintage Full Body Stock Cars, Sport Compact, IMCA Stock Car, WISSOTA Mod Four, WISSOTA Super Stock | Results | | Tim Siercks (IMCA Stock Car) | 5th | - | - | 10th (DNF) |
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| 7/10/2021 | North Central Speedway - Brainerd, MN Vintage Modifieds: Northern Vintage Stockcar Racers Hobby Stocks, A Modifieds, B Modifieds, Vintage Full Body Stock Cars, Sport Compact, IMCA Stock Car, WISSOTA Mod Four, WISSOTA Super Stock | Results | | Tim Siercks (IMCA Stock Car) | 3rd | - | - | 5th |
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| 7/16/2021 | Princeton Speedway - Princeton, MN Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact, IMCA Stock Car, WISSOTA Super Stock | Results | | Tim Siercks (IMCA Stock Car) | 2nd | - | - | 2nd |
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| 7/30/2021 | Princeton Speedway - Princeton, MN Hobby Stocks, A Modifieds, Winged A-Class, B Modifieds, Sport Compact, IMCA Stock Car, WISSOTA Mod Four | Results | | Tim Siercks (IMCA Stock Car) | 2nd | - | - | 8th (DNF) |
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| 7/31/2021 | North Central Speedway - Brainerd, MN Hobby Stocks, A Modifieds, Winged A-Class, B Modifieds, Sport Compact, IMCA Stock Car, WISSOTA Mod Four | Results | | Tim Siercks (IMCA Stock Car) | 1st | - | - | 4th |
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| 9/24/2021 | Jamestown Speedway - Jamestown, ND 50th Annual Jamestown Stock Car Stampede B Modifieds, Semi-Pro Legends, Pure Stock, IMCA Modified, IMCA Northern SportMod, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock, Junior Slingshots | Results | | Tim Siercks (IMCA Northern SportMod) | 2nd | - | - | 11th |
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| 9/25/2021 | Jamestown Speedway - Jamestown, ND 50th Annual Jamestown Stock Car Stampede B Modifieds, Semi-Pro Legends, Pure Stock, IMCA Modified, IMCA Northern SportMod, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock, Junior Slingshots | Results | | Tim Siercks (IMCA Northern SportMod) | 3rd | - | - | 24th (DNF) |
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