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| 4/17/2021 | North Central Speedway - Brainerd, MN Season Opener Hobby Stocks, A Modifieds, B Modifieds, Sport Compact, IMCA Stock Car, WISSOTA Mod Four, WISSOTA Super Stock | Results | | Mark Prueser (A Modifieds) | 7th | - | - | 13th |
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| 5/1/2021 | North Central Speedway - Brainerd, MN Ron Johnson memorial race Hobby Stocks, A Modifieds, B Modifieds, Sport Compact, IMCA Stock Car, WISSOTA Mod Four, WISSOTA Super Stock | Results | | Mark Prueser (A Modifieds) | 7th | - | - | 14th |
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| 5/8/2021 | North Central Speedway - Brainerd, MN Hobby Stocks, A Modifieds, B Modifieds, Sport Compact, IMCA Stock Car, WISSOTA Mod Four, WISSOTA Super Stock | Results | | Mark Prueser (A Modifieds) | 5th | - | - | 11th |
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| 5/22/2021 | North Central Speedway - Brainerd, MN Meet the drivers Hobby Stocks, A Modifieds, B Modifieds, Sport Compact, IMCA Stock Car, WISSOTA Mod Four, WISSOTA Super Stock | Results | | Mark Prueser (A Modifieds) | 5th | - | - | 13th (DNF) |
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| 5/29/2021 | Boone Speedway - Boone, IA Saturday Night Series Weekly #7 IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Mod Lite | Results | | Mark Prueser (IMCA Modified) | 7th (DNF) | - | 6th | - |
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| 6/12/2021 | North Central Speedway - Brainerd, MN Hobby Stocks, A Modifieds, B Modifieds, Sport Compact, IMCA Stock Car, WISSOTA Mod Four, WISSOTA Super Stock | Results | | Mark Prueser (A Modifieds) | 6th | - | - | 9th |
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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 | | Mark Prueser (A Modifieds) | - | - | - | - | | Mark Prueser (IMCA Modified) | 6th | - | DNS | - |
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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 | | Mark Prueser (IMCA Modified) | 7th | - | 15th (DNF) | - |
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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 | | Mark Prueser (IMCA Modified) | 9th | - | 12th (DNF) | - |
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| 8/14/2021 | North Central Speedway - Brainerd, MN Bud Jones and sons night Hobby Stocks, A Modifieds, B Modifieds, Sport Compact, IMCA Stock Car, WISSOTA Mod Four, WISSOTA Super Stock | Results | | Mark Prueser (A Modifieds) | 6th | - | - | 8th |
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