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| 4/3/2021 | Slinger Super Speedway - Slinger, WI 2020 Awards Banquet/ 2021 Registration Asphalt Late Models, Asphalt Super Late Models, Asphalt Mini Stocks, Sportsmans, Outlaws, Pro Legends, Asphalt 4-Cylinders, Asphalt Street Stocks, Asphalt Sport Mods, Asphalt Figure 8 Stock Cars, Asphalt Sport Trucks, Sport Compact, Outlaw Hobby Stocks, Honda Challenge, Figure 8 - FWD-Open | Results | | Bill Prietzel (Asphalt Sport Mods) | - | - | - | - |
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| 4/25/2021 | Slinger Super Speedway - Slinger, WI Big 8 Series 88 Asphalt Late Models, Sportsmans, Asphalt 4-Cylinders, Asphalt Sport Mods, Asphalt Figure 8 Stock Cars, Sport Compact | Results | | Bill Prietzel (Asphalt Sport Mods) | 5th | - | - | 2nd |
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| 5/8/2021 | Dells Raceway Park - Wisconsin Dells, WI Midwest Lifestyles Construction 59th Season Opener 6pm Asphalt Late Models, Midwest Modifieds, Bandits, Asphalt Sportsman Late Models | Results | | Bill Prietzel (Midwest Modifieds) | - | 4th | - | 3rd |
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| 5/22/2021 | Dells Raceway Park - Wisconsin Dells, WI Southern Aprons Challenge Night-Tribute to Johnny Ziegler-Full Program of Racing 6pm Asphalt Late Models, Midwest Modifieds, Pro Legends, Asphalt Pure Stocks | Results | | Bill Prietzel (Midwest Modifieds) | - | 6th | - | 5th |
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| 6/5/2021 | Dells Raceway Park - Wisconsin Dells, WI Dairyland 100 Alive for 5 Race #2 6pm Asphalt Super Late Models, Midwest Modifieds, Asphalt Sport Mods | Results | | Bill Prietzel (Midwest Modifieds) | - | 8th | - | 6th |
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| 7/4/2021 | Slinger Super Speedway - Slinger, WI Mopar Night Asphalt Late Models, Sportsmans, Asphalt 4-Cylinders, Asphalt Street Stocks, Asphalt Sport Mods, Asphalt Figure 8 Stock Cars, Honda Challenge | Results | | Bill Prietzel (Asphalt Sport Mods) | 3rd | - | - | 2nd |
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| 7/10/2021 | Dells Raceway Park - Wisconsin Dells, WI Blystone Towing & Recovery 50-Weekly Racing Division 6pm Presented by Assembly Products Asphalt Late Models, Midwest Modifieds, Bandits, Asphalt Sportsman Late Models, Generic 1 | Results | | Bill Prietzel (Midwest Modifieds) | - | 1st | - | 3rd |
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| 7/24/2021 | Dells Raceway Park - Wisconsin Dells, WI Incredible Cars of Cross Plains 50-Weekly Racing Divisions 6PM Asphalt Late Models, Midwest Modifieds, Bandits, Generic 1, Junior 2 Animal Asphalt Karting | Results | | Bill Prietzel (Midwest Modifieds) | 3rd | - | - | 2nd |
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| 8/1/2021 | Slinger Super Speedway - Slinger, WI Obermeyer’s 41 Auto Body Hot Rod Night & Car Show Asphalt Late Models, Asphalt Super Late Models, Outlaws, Asphalt 4-Cylinders, Asphalt Sport Mods, Asphalt Figure 8 Stock Cars | Results | | Bill Prietzel (Asphalt Sport Mods) | 1st | - | - | 7th (DNF) |
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| 8/7/2021 | Dells Raceway Park - Wisconsin Dells, WI Weaver Auto Value Late Model 50-Racing 6PM Asphalt Late Models, Midwest Modifieds, Bandits, Pro Legends, Generic 1 | Rain Out |
| 8/29/2021 | Slinger Super Speedway - Slinger, WI Milwaukee Tools Presents a Night at the Races Asphalt Super Late Models, Sportsmans, Outlaws, Asphalt 4-Cylinders, Asphalt Sport Mods, Asphalt Figure 8 Stock Cars | Results | | Bill Prietzel (Asphalt Sport Mods) | 8th (DNF) | - | - | DNS |
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| 9/11/2021 | Dells Raceway Park - Wisconsin Dells, WI Kalahari Resorts 2021 Season Championship Night Asphalt Late Models, Midwest Modifieds, Bandits, Pro Legends, Asphalt Sportsman Late Models | Results | | Bill Prietzel (Midwest Modifieds) | - | 1st | - | 10th |
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| 9/24/2021 | Dells Raceway Park - Wisconsin Dells, WI Midwest Championship Weekend Friday Dave Rottiger Memorial Asphalt Late Models, Stock Cars, Midwest Modifieds, Bandits, Pro Legends, Asphalt Sportsman Late Models | Rain Out |
| 9/25/2021 | Dells Raceway Park - Wisconsin Dells, WI Midwest Championship Weekend Saturday Presented by DRM Companies Asphalt Late Models, Stock Cars, Midwest Modifieds, Bandits, Pro Legends, Asphalt Pure Stocks | Results | | Bill Prietzel (Midwest Modifieds) | - | - | - | 7th |
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| 12/11/2021 | Dells Raceway Park - Wisconsin Dells, WI DRP Season Championship Banquet Chula Vista Resort 5pm Asphalt Late Models, Midwest Modifieds, Bandits, Pro Legends, Asphalt Sportsman Late Models, Asphalt Pure Stocks, Train Racing, Generic 1 | Results | | Bill Prietzel (Midwest Modifieds) | - | - | - | - |
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