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| 4/3/2021 | RPM Speedway - Hays, KS RPM Speedway Opening Night IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Mike Petersilie (IMCA Modified) | 1st | - | - | 10th | | Mike Petersilie (IMCA Stock Car) | 2nd | - | - | 4th |
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| 4/23/2021 | Salina Speedway - Salina, KS Opening Night Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Dwarf | Results | | Mike Petersilie (Stock Cars) | 4th | - | - | 3rd |
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| 4/30/2021 | Salina Speedway - Salina, KS Asphalt Mini Stocks, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds | Results | | Mike Petersilie (Stock Cars) | 1st | - | - | 4th |
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| 5/1/2021 | Dodge City Raceway Park - Dodge City, KS DCRP: Weekly Racing 305 Sprints - Winged, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Mike Petersilie (IMCA Stock Car) | 7th | - | - | 16th |
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| 5/8/2021 | RPM Speedway - Hays, KS Weekly IMCA Racing IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Mike Petersilie (IMCA Stock Car) | 2nd | - | - | 6th |
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| 5/28/2021 | Sweetwater Speedway - Rock Springs, WY Rudy Yeager Memorial Dwarf: Western States Dwarf Car Association A Modifieds, B Modifieds, Street Stocks, 250 yamaha, Asphalt Street Stocks, Generic 1, Generic 2, Speedstr | Results | | Mike Petersilie (Street Stocks) | 2nd | - | - | 3rd |
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| 5/29/2021 | Sweetwater Speedway - Rock Springs, WY Rudy Yeager Memorial Dwarf: Western States Dwarf Car Association A Modifieds, B Modifieds, Street Stocks, 250 yamaha, Asphalt Street Stocks, Generic 1, Generic 2, Speedstr | Results | | Mike Petersilie (Street Stocks) | 2nd | - | - | 6th |
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| 6/4/2021 | Salina Speedway - Salina, KS Asphalt Mini Stocks, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds | Results | | Mike Petersilie (Stock Cars) | 2nd | - | - | 5th | | Mike Petersilie (A Modifieds) | 6th | - | - | 9th |
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| 6/11/2021 | Salina Speedway - Salina, KS Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Dwarf | Results | | Mike Petersilie (Stock Cars) | 4th | - | - | 6th |
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| 6/12/2021 | RPM Speedway - Hays, KS Weekly IMCA Racing IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Mike Petersilie (IMCA Stock Car) | 7th | - | - | 2nd |
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| 7/9/2021 | Salina Speedway - Salina, KS Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Dwarf | Results | | Mike Petersilie (Stock Cars) | 3rd | - | - | 3rd |
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| 7/11/2021 | RPM Speedway - Hays, KS Ellis County Fair Races - Wheat Shocker Nationals Presented by Nutrien Ag Solutions 305 Sprints - Winged, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car | Results | | Mike Petersilie (IMCA Stock Car) | 3rd | - | - | 7th |
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| 7/23/2021 | Salina Speedway - Salina, KS Mid-Summer Challenge Asphalt Mini Stocks, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds | Results | | Mike Petersilie (Stock Cars) | 3rd | - | - | 4th |
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| 7/24/2021 | RPM Speedway - Hays, KS Weekly IMCA Racing IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Mike Petersilie (IMCA Stock Car) | 4th | - | - | 3rd |
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| 8/7/2021 | RPM Speedway - Hays, KS Cody Younger Memorial Race IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Rain Out |
| 9/4/2021 | Boone Speedway - Boone, IA Wild Rose Casino Prelude to the Super Nationals IMCA Modified, IMCA Stock Car, Pro Dwarf, IMCA Mod Lite | Results | | Mike Petersilie (IMCA Modified) | 3rd | - | 4th | - | | Mike Petersilie (IMCA Stock Car) | 4th | - | 6th | - |
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| 9/8/2021 | Boone Speedway - Boone, IA 2021 IMCA Speedway Motors Super Nationals Fueled by Casey’s IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Mike Petersilie (IMCA Modified) | 4th | - | 5th | - | | Mike Petersilie (IMCA Stock Car) | 4th | - | 7th | - |
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| 9/9/2021 | Boone Speedway - Boone, IA 2021 IMCA Speedway Motors Super Nationals Fueled by Casey’s Sportsmans, Midwest Modifieds, Vintage Full Body Stock Cars, IMCA Modified, IMCA Stock Car | Results | | Mike Petersilie (IMCA Modified) | 3rd | - | - | - | | Mike Petersilie (IMCA Stock Car) | 1st | - | - | 9th |
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| 9/10/2021 | Boone Speedway - Boone, IA 2021 IMCA Speedway Motors Super Nationals Fueled by Casey’s Generic 2, IMCA Modified, IMCA Stock Car | Results | | Mike Petersilie (IMCA Modified) | 3rd | - | - | 14th | | Mike Petersilie (IMCA Stock Car) | 8th | - | - | - |
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| 9/11/2021 | Boone Speedway - Boone, IA 2021 IMCA Speedway Motors Super Nationals Fueled by Casey’s Midwest Modifieds, Vintage Full Body Stock Cars, Vintage Modifieds, Generic 1, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Mike Petersilie (IMCA Modified) | 1st | - | - | 14th |
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| 9/24/2021 | Salina Speedway - Salina, KS Mid-America Clash -- Night 1 Asphalt Mini Stocks, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds | Results | | Mike Petersilie (Stock Cars) | 4th | - | 4th | 7th | | Mike Petersilie (A Modifieds) | 4th | - | - | 6th |
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| 9/25/2021 | Salina Speedway - Salina, KS Mid-America Clash -- Night 2 Asphalt Mini Stocks, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds | Results | | Mike Petersilie (Stock Cars) | 3rd | - | - | 18th (DNF) | | Mike Petersilie (A Modifieds) | 7th | - | 8th | 7th |
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| 10/1/2021 | RPM Speedway - Hays, KS Fall Nationals Night 1 IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Mike Petersilie (IMCA Modified) | 5th | - | - | - | | Mike Petersilie (IMCA Stock Car) | 5th | - | - | 5th |
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| 10/2/2021 | RPM Speedway - Hays, KS Fall Nationals Night 2 Generic 1, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Mike Petersilie (IMCA Modified) | - | - | - | 22nd (DNF) | | Mike Petersilie (IMCA Stock Car) | 1st | - | - | 7th |
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| 10/12/2021 | Batesville Motor Speedway - Locust Grove, AR World IMCA Stock Car Championship Practice IMCA Stock Car | Results | | Mike Petersilie (IMCA Stock Car) | - | - | - | - |
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