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| 5/7/2021 | Wagner Speedway - Wagner, SD Week 1 Dirt Late Models, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Mark Krieger (IMCA Stock Car) | 6th | - | - | 6th (DNF) |
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| 5/14/2021 | Wagner Speedway - Wagner, SD Week 2 Dirt Late Models, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Mark Krieger (IMCA Stock Car) | 3rd | - | - | 6th (DNF) |
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| 8/1/2021 | Stuart Raceway - Stuart, NE 305 Sprints - Winged, Hobby Stocks, Stock Cars, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, B Modifieds | Results | | Mark Krieger (Stock Cars) | 3rd | - | - | 4th |
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| 8/8/2021 | Stuart Raceway - Stuart, NE 305 Sprints - Winged, Hobby Stocks, Stock Cars, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, B Modifieds | Results | | Mark Krieger (Stock Cars) | 3rd | - | - | 2nd |
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| 8/13/2021 | Wagner Speedway - Wagner, SD Week 14 IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Mark Krieger (IMCA Stock Car) | 3rd | - | - | 3rd |
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| 8/15/2021 | Stuart Raceway - Stuart, NE 305 Sprints - Winged, Hobby Stocks, Stock Cars, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, B Modifieds | Results | | Mark Krieger (Stock Cars) | 3rd | - | - | 2nd |
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| 8/20/2021 | Wagner Speedway - Wagner, SD Week 15 Dirt Late Models, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Mark Krieger (IMCA Stock Car) | 4th | - | - | 7th (DNF) |
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| 8/27/2021 | Wagner Speedway - Wagner, SD Championship Dirt Late Models, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Mark Krieger (IMCA Stock Car) | 4th | - | - | 3rd |
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