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| 3/28/2020 | Slinger Super Speedway - Slinger, WI Driver Registration Day 12:00 pm - 3:00 pm 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 | Results | | Bill Prietzel (Asphalt Sport Mods) | - | - | - | - |
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| 4/19/2020 | Slinger Super Speedway - Slinger, WI Annual Open Day 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 | Postponed |
| 5/30/2020 | Dells Raceway Park - Wisconsin Dells, WI Nabbefeldt Memorial-CWRA Super Late Models Twin Features Asphalt Super Late Models, Midwest Modifieds, Young Guns, Pro Legends, Asphalt Sportsman Late Models, Asphalt Sport Mods | Results | | Bill Prietzel (Midwest Modifieds) | - | 3rd | - | 14th |
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| 5/31/2020 | Slinger Super Speedway - Slinger, WI Keith's Marina Race Against Cancer Alan Kulwicki Memorial Asphalt Late Models, Asphalt Super Late Models, Sportsmans, Asphalt 4-Cylinders, Asphalt Street Stocks, Sport Compact, Honda Challenge | Results | | Bill Prietzel (Sportsmans) | 1st | - | - | 10th (DNF) |
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| 6/7/2020 | Slinger Super Speedway - Slinger, WI Vintage Night Asphalt Late Models, Sportsmans, Asphalt Sport Mods, Asphalt Figure 8 Stock Cars, Sport Compact, Honda Challenge | Results | | Bill Prietzel (Asphalt Sport Mods) | 1st | - | - | 3rd |
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| 6/13/2020 | Dells Raceway Park - Wisconsin Dells, WI Brewster Lanes 50-Full Racing Program Asphalt Late Models, Midwest Modifieds, Bandits, Pro Legends, Asphalt Sportsman Late Models, Junior 2 Animal Asphalt Karting | Results | | Bill Prietzel (Midwest Modifieds) | - | 2nd | - | 3rd |
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| 7/5/2020 | Slinger Super Speedway - Slinger, WI Prelude to the Nationals Asphalt Late Models, Asphalt 4-Cylinders, Asphalt Street Stocks, Asphalt Sport Mods, Asphalt Figure 8 Stock Cars, Outlaw Hobby Stocks, Honda Challenge | Results | | Bill Prietzel (Asphalt Sport Mods) | 2nd | - | - | 5th |
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| 7/11/2020 | Dells Raceway Park - Wisconsin Dells, WI 608-Graphics Night & All Students $5 TT 4:45 Racing 6PM Asphalt Late Models, Midwest Modifieds, Bandits, Young Guns, Pro Legends | Results | | Bill Prietzel (Midwest Modifieds) | - | 3rd | - | 4th |
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| 7/25/2020 | Dells Raceway Park - Wisconsin Dells, WI Assembly Products Late Model Shoot Out $5000 to Win-Plus Live Band After Races Asphalt Late Models, Midwest Modifieds, Pro Legends | Results | | Bill Prietzel (Midwest Modifieds) | - | 5th | - | 3rd |
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| 8/8/2020 | Dells Raceway Park - Wisconsin Dells, WI Starkey Hearing Night-Full Program of Racing Asphalt Late Models, Midwest Modifieds, Bandits, Pro Legends, Junior 2 Animal Asphalt Karting | Results | | Bill Prietzel (Midwest Modifieds) | - | 3rd | - | 11th |
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| 8/16/2020 | Slinger Super Speedway - Slinger, WI Back in the Day Pricing Asphalt Late Models, Sportsmans, Asphalt Street Stocks, Asphalt Sport Mods, Muscle Car, Sport Compact, Honda Challenge | Results | | Bill Prietzel (Asphalt Sport Mods) | 1st | - | - | 3rd |
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| 8/22/2020 | Dells Raceway Park - Wisconsin Dells, WI Blystone Towing & Recovery Night Asphalt Late Models, Midwest Modifieds, Bandits, Pro Legends, Asphalt Mini Trucks | Results | | Bill Prietzel (Midwest Modifieds) | - | 4th | - | 2nd |
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| 8/29/2020 | Dells Raceway Park - Wisconsin Dells, WI Little Family Daycare Night-Season Championship Asphalt Late Models, Midwest Modifieds, Bandits, Asphalt Sportsman Late Models | Results | | Bill Prietzel (Midwest Modifieds) | - | 1st | - | 1st |
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| 9/26/2020 | Dells Raceway Park - Wisconsin Dells, WI September Showdown Saturday-Dave Rottiger Memorial Twin Features All Divisions Asphalt Late Models, Midwest Modifieds, Bandits, Outlaws, Asphalt Sportsman Late Models | Results | | Bill Prietzel (Midwest Modifieds) | - | - | - | 13th |
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| 11/14/2020 | Dells Raceway Park - Wisconsin Dells, WI 2020-Dells Raceway Park Champions Celebration Banquet at Chula Vista Resort Asphalt Late Models, Asphalt Super Late Models, Midwest Modifieds, Bandits, Pro Legends, Asphalt Sportsman Late Models, Asphalt Sport Mods, Asphalt Pure Stocks | Results | | Bill Prietzel (Midwest Modifieds) | - | - | - | - |
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| 12/4/2020 | Five Flags Speedway - Pensacola, FL 53rd Annual Snowball Derby Asphalt Super Late Models, Sportsmans, Asphalt Pro Trucks, Asphalt Sport Mods, Asphalt Pure Stocks, Pro Late Model | Results | | Bill Prietzel (Asphalt Sport Mods) | - | - | - | 14th |
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