| | Heat | Dash | B Feature | A Feature |
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| 4/25/2020 | Park Jefferson International Speedway - Jefferson, SD Open Wheel Nationals 410 Sprints - Winged, A Modifieds, IMCA Modified | Results | | Jim Mathieson (A Modifieds) | 6th | - | 8th | - |
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| 4/26/2020 | Interstate Speedway (SD) - Jefferson, SD Casey's General Store Presents IMCA Weekly Racing Series Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact, IMCA Modified | Results | | Jim Mathieson (A Modifieds) | 3rd | - | - | 19th |
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| 5/8/2020 | Park Jefferson International Speedway - Jefferson, SD SPRING NATIONALS PRESENTED BY RICKY LEMMEN MOTORSPORTS Hobby Stocks, Stock Cars, B Modifieds, Hornets, IMCA Modified | Results | | Jim Mathieson (IMCA Modified) | 7th | - | 11th | - |
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| 5/9/2020 | Park Jefferson International Speedway - Jefferson, SD SPRING NATIONALS PRESENTED BY RICKY LEMMEN MOTORSPORTS 305 Sprints - Winged, Hobby Stocks, Stock Cars, B Modifieds, IMCA Modified | Results | | Jim Mathieson (IMCA Modified) | 6th | - | - | 26th (DNF) |
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| 5/10/2020 | Interstate Speedway (SD) - Jefferson, SD Spring Thaw IMCA w/ Tri State Late Models Dirt Late Models: Tri-State Late Models Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 4th | - | - | 15th |
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| 5/17/2020 | Interstate Speedway (SD) - Jefferson, SD Professional Concrete Presents Sprint Series Of Nebraska Racesaver Sprints plus Weekly Racing Series 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 5th | - | - | 13th |
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| 5/23/2020 | Park Jefferson International Speedway - Jefferson, SD Memorial Day Clash featuring NE 360 Sprints & $1,000 to win IMCA Modified Fastshafts 360 Sprints - Winged: Malvern Bank 360 Sprints with Midwest Sprint Touring Series 305 Sprints - Winged, Hobby Stocks, Stock Cars, IMCA Modified | Results | | Jim Mathieson (IMCA Modified) | 6th | - | - | 17th |
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| 5/24/2020 | Interstate Speedway (SD) - Jefferson, SD M&T Motorsports Presents Weekly Racing Series Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | DNS | - | - | 18th |
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| 5/31/2020 | Interstate Speedway (SD) - Jefferson, SD Repairable Vehicle’s.com Tri State Late Models plus IMCA classes Dirt Late Models: Tri-State Late Models Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 1st | - | - | 11th |
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| 6/7/2020 | Interstate Speedway (SD) - Jefferson, SD Tom & Carol Reed Present IMCA Weekly Racing Series Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 7th | - | - | 14th |
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| 6/14/2020 | Interstate Speedway (SD) - Jefferson, SD Ideal Wheels Presents 305 Racesaver Sprints IMCA Weekly Racing Series 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 3rd | - | - | 12th |
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| 6/28/2020 | Interstate Speedway (SD) - Jefferson, SD J&J Fittings presents Midwest Madness Mod Tour plus weekly Racing IMCA Modified: Midwest Madness Tour Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Jim Mathieson (A Modifieds) | 6th | - | 14th (DNF) | - |
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| 6/29/2020 | Clay County Fair Speedway - Spencer, IA Midwest Madness Tour sponsored by Farmers Bank IMCA Modified: Midwest Madness Tour IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 7th | - | 15th | - |
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| 7/1/2020 | Kossuth County Speedway - Algona, IA Midwest Madness Tour IMCA Modified: Midwest Madness Tour Hobby Stocks, A Modifieds, B Modifieds, Street Stocks, Enduro, Sport Compact, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Jim Mathieson (A Modifieds) | 6th | - | 15th | - |
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| 7/2/2020 | Stuart Speedway - Stuart, IA 21st Annual Ron Little Memorial IMCA Modified: Midwest Madness Tour Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, 600cc Modifieds, Sport Compact, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Jim Mathieson (A Modifieds) | 7th | - | 15th | - |
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| 7/3/2020 | Crawford County Speedway - Denison, IA IMCA Modified: Midwest Madness Tour Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Jim Mathieson (A Modifieds) | 3rd | - | - | 19th |
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| 7/10/2020 | Murray County Speedway - Slayton, MN Brycen Johnson Memorial Sport Mod Special, Plus IMCA Classes Sponsored by Pizza Ranch of Slayton Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 4th | - | - | 9th |
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| 7/12/2020 | Interstate Speedway (SD) - Jefferson, SD Local Law Enforcement presents IMCA Weekly Racing Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 1st | - | - | 8th |
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| 7/13/2020 | Clay County Fair Speedway - Spencer, IA Weekly Racing IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 5th | - | - | 19th |
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| 7/19/2020 | Interstate Speedway (SD) - Jefferson, SD IDIF Presents Weekly Racing Series Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 6th (DNF) | - | - | 11th |
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| 7/26/2020 | Interstate Speedway (SD) - Jefferson, SD O'Reilly's Auto Parts present IMCA Weekly Racing Series Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 1st | - | - | 7th |
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| 8/1/2020 | Park Jefferson International Speedway - Jefferson, SD IMCA Weekly Racing 305 Sprints - Winged, Hobby Stocks, Stock Cars, B Modifieds, Hornets, IMCA Modified | Results | | Jim Mathieson (IMCA Modified) | 5th | - | - | 8th |
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| 8/2/2020 | Interstate Speedway (SD) - Jefferson, SD Hawkeye Distributions presents Weekly Racing Series Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 2nd | - | - | 8th |
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| 8/3/2020 | Clay County Fair Speedway - Spencer, IA Weekly Racing IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 7th | - | 10th | - |
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| 8/7/2020 | Park Jefferson International Speedway - Jefferson, SD 7th Annual J&J Fitting Iron Cup Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets, IMCA Modified | Results | | Jim Mathieson (A Modifieds) | 7th | - | - | - |
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| 8/8/2020 | Park Jefferson International Speedway - Jefferson, SD 7th Annual J&J Fitting Iron Cup-IState Truck Centers Championship Night 305 Sprints - Winged, Hobby Stocks, Stock Cars, B Modifieds, Hornets, IMCA Modified | Results | | Jim Mathieson (IMCA Modified) | 8th | - | - | 21st |
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| 8/9/2020 | Interstate Speedway (SD) - Jefferson, SD Casey's presents IMCA Weekly Racing Series Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 4th | - | - | 1st |
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| 8/13/2020 | Hancock County Speedway - Britt, IA IMT Transport Night of 1000 Stars - $3,000 to WIN Modifieds Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact, IMCA Modified | Results | | Jim Mathieson (A Modifieds) | 5th | - | 4th | 17th |
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| 8/16/2020 | Interstate Speedway (SD) - Jefferson, SD Racers for Autism Weekly Racing Series IMCA Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 2nd | - | - | 2nd |
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| 8/21/2020 | Murray County Speedway - Slayton, MN IMCA Classes-Swede Anderson Shootout/Gary Muecke Mod Special - Rowdy’s Radiator / Avoca Spray Factory Stocks, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 2nd | - | - | 10th |
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| 8/23/2020 | Interstate Speedway (SD) - Jefferson, SD Contractor Supply presents IMCA Weekly Racing Series Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 3rd | - | - | 9th (DNF) |
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| 8/30/2020 | Interstate Speedway (SD) - Jefferson, SD Cookies Food Products presents IMCA Weekly Racing Vintage Full Body Stock Cars: Midwest Classic Stock Car Association Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 4th | - | - | 6th |
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| 9/4/2020 | Interstate Speedway (SD) - Jefferson, SD Sams Club Presents IMCA Racing Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 4th | - | - | 5th |
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| 9/15/2020 | Clay County Fair Speedway - Spencer, IA Fair Special Dirt Late Models: Tri-State Late Models Hobby Stocks, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 5th | - | - | 10th |
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| 9/16/2020 | Clay County Fair Speedway - Spencer, IA Fair Special Hobby Stocks, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA Sport Compact | Results | | Jim Mathieson (IMCA Modified) | 4th | - | - | 13th |
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| 9/20/2020 | Interstate Speedway (SD) - Jefferson, SD Fleet Farm presents Season Championship Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 1st | - | - | 8th |
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| 10/2/2020 | Interstate Speedway (SD) - Jefferson, SD 2nd Annual South Dakota Nationals Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 4th | - | - | 8th |
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| 10/3/2020 | Interstate Speedway (SD) - Jefferson, SD South Dakota Nationals Championship 2020 Hobby Stocks, Stock Cars, A Modifieds, Limited Sport Mod, Sport Compact | Results | | Jim Mathieson (A Modifieds) | - | - | - | 6th |
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| 10/10/2020 | Murray County Speedway - Slayton, MN Hub City Rumble Factory Stocks, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 5th | - | - | 16th (DNF) |
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| 10/16/2020 | Beatrice Speedway - Beatrice, NE Octoberfest Night 1 Complete Program Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, IMCA Late Models, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 4th | - | - | 21st |
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| 10/17/2020 | Beatrice Speedway - Beatrice, NE Octoberfest Night 2 Complete Program Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, IMCA Late Models, Sport Compact | Results | | Jim Mathieson (A Modifieds) | 8th | - | 8th | - |
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