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| 1/8/2020 | Cocopah Speedway - Somerton, AZ Open Practice 6-9 PM IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Marlyn Seidler (IMCA Modified) | - | - | - | - |
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| 1/9/2020 | Cocopah Speedway - Somerton, AZ Winter Nationals IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Marlyn Seidler (IMCA Modified) | 3rd | - | - | 7th |
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| 1/10/2020 | Cocopah Speedway - Somerton, AZ Winter Nationals IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Marlyn Seidler (IMCA Modified) | 1st | - | - | 3rd |
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| 1/11/2020 | Cocopah Speedway - Somerton, AZ Winter Nationals IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Marlyn Seidler (IMCA Modified) | 10th (DNF) | - | 4th | 25th (DNF) |
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| 1/16/2020 | Cocopah Speedway - Somerton, AZ Winter Nationals IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Marlyn Seidler (IMCA Modified) | 5th | - | 2nd | 11th |
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| 1/17/2020 | Cocopah Speedway - Somerton, AZ Winter Nationals IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Marlyn Seidler (IMCA Modified) | 3rd | - | - | 26th (DNF) |
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| 1/18/2020 | Cocopah Speedway - Somerton, AZ Winter Nationals IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock | Results | | Marlyn Seidler (IMCA Modified) | 5th | - | 2nd | 8th |
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| 2/7/2020 | Arizona Speedway - Queen Creek, AZ Arizona Dirt Track Tour A Modifieds: IMCA Arizona Dirt Tour Stock Cars, B Modifieds, IMCA Modified | Results | | Marlyn Seidler (A Modifieds) | 5th | - | 2nd | 22nd (DNF) |
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| 2/8/2020 | Arizona Speedway - Queen Creek, AZ Arizona Dirt Track Tour A Modifieds: IMCA Arizona Dirt Tour Stock Cars, B Modifieds, IMCA Modified | Results | | Marlyn Seidler (A Modifieds) | 4th | - | 17th (DNF) | - |
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| 2/9/2020 | Central Arizona Raceway - Casa Grande, AZ Arizona Dirt Track Tour A Modifieds: IMCA Arizona Dirt Tour Stock Cars, B Modifieds, IMCA Modified | Results | | Marlyn Seidler (A Modifieds) | 5th | - | - | 9th |
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| 6/5/2020 | Dacotah Speedway - Mandan, ND Mandan Dirt Series at Dacotah Speedway Hobby Stocks, Semi-Pro Legends, IMCA Modified, IMCA Sport Compact, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 1st | - | - | 7th |
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| 6/6/2020 | Jamestown Speedway - Jamestown, ND 2020 Jamestown Speedway Season Opener & Wissota Midwest Modified Special A Modifieds, B Modifieds, Street Stocks, Semi-Pro Legends, Pure Stock, All Star Slingshots, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Street Stock, Junior Slingshots | Results | | Marlyn Seidler (IMCA Modified) | 3rd | - | - | 18th (DNF) |
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| 6/12/2020 | Dacotah Speedway - Mandan, ND Mandan Dirt Series with WISSOTA Street Stock Tour Hobby Stocks, Semi-Pro Legends, IMCA Modified, IMCA Sport Compact, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 2nd | - | - | 3rd |
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| 6/13/2020 | Jamestown Speedway - Jamestown, ND Don Gumke Memorial & 2020 Wissota Street Stock Tour A Modifieds, Street Stocks, Pure Stock, IMCA Modified, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 7th (DNF) | - | DNS | - |
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| 6/19/2020 | Dacotah Speedway - Mandan, ND Mandan Dirt Series at Dacotah Speedway Hobby Stocks, Semi-Pro Legends, IMCA Modified, IMCA Sport Compact, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 1st | - | - | 3rd |
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| 6/20/2020 | Jamestown Speedway - Jamestown, ND 2nd Annual Jeff Carpenter Memorial Race & RC Car Night A Modifieds, B Modifieds, Street Stocks, Semi-Pro Legends, Pure Stock, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Street Stock, Junior Slingshots | Results | | Marlyn Seidler (IMCA Modified) | 1st | - | - | 1st |
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| 6/26/2020 | Big Sky Speedway - Billings, MT 360 Sprints - Winged: ASCS Frontier Region IMCA Modified, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 2nd | - | - | 3rd |
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| 6/27/2020 | Big Sky Speedway - Billings, MT 360 Sprints - Winged: ASCS Frontier Region IMCA Modified, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 8th (DNF) | - | - | DNS |
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| 7/4/2020 | Jamestown Speedway - Jamestown, ND Fireworks Spectacular & Armed Forces Night A Modifieds, B Modifieds, Street Stocks, Semi-Pro Legends, Pure Stock, All Star Slingshots, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Street Stock, Junior Slingshots | Rain Out |
| 7/10/2020 | Red River Valley Speedway - West Fargo, ND Dakota Classic Tour IMCA Modified: Dakota Classic Modified Tour IMCA Stock Car | Results | | Marlyn Seidler (IMCA Modified) | 9th | - | 11th (DNF) | - |
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| 7/11/2020 | Jamestown Speedway - Jamestown, ND POWRi Minn-Kota Lightning Sprints at Jamestown Speedway Lightning Sprints: POWRi Minn-Kota Lightning Sprints IMCA Modified: Dakota Classic Modified Tour A Modifieds, B Modifieds, Street Stocks, Semi-Pro Legends, Winged Crate Sprints, Pure Stock, All Star Slingshots, IMCA Stock Car, WISSOTA Midwest Mods, WISSOTA Street Stock, Junior Slingshots | Results | | Marlyn Seidler (IMCA Modified) | 8th (DNF) | - | DNS | - |
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| 7/14/2020 | Southwest Speedway - Dickinson, ND Dakota Classic Modified Tour IMCA Modified: Dakota Classic Modified Tour A Modifieds, IMCA Stock Car | Results | | Marlyn Seidler (IMCA Modified) | 2nd | - | - | 30th (DNF) |
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| 7/15/2020 | Dacotah Speedway - Mandan, ND Dakota Classic Modified Tour IMCA Modified: Dakota Classic Modified Tour A Modifieds, IMCA Stock Car | Results | | Marlyn Seidler (IMCA Modified) | 7th | - | 5th | 18th |
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| 7/18/2020 | Jamestown Speedway - Jamestown, ND Kids Night & Summer Showcase Night A Modifieds, B Modifieds, Street Stocks, Semi-Pro Legends, Pure Stock, All Star Slingshots, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Street Stock, Junior Slingshots | Results | | Marlyn Seidler (IMCA Modified) | 1st | - | - | 1st |
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| 7/24/2020 | Dacotah Speedway - Mandan, ND Mandan Dirt Series Hobby Stocks, Semi-Pro Legends, IMCA Modified, IMCA Sport Compact, WISSOTA Street Stock | Rain Out |
| 7/31/2020 | Dacotah Speedway - Mandan, ND North Dakota Governor's Cup - Night 1 410 Sprints - Winged, Winged Sprints, Hobby Stocks, Semi-Pro Legends, IMCA Modified, IMCA Sport Compact, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 2nd | - | - | 6th |
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| 8/1/2020 | Dacotah Speedway - Mandan, ND North Dakota Governor's Cup - Night 2 410 Sprints - Winged, Winged Sprints, Hobby Stocks, Semi-Pro Legends, IMCA Modified, IMCA Sport Compact, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 2nd | - | - | 3rd |
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| 8/8/2020 | Jamestown Speedway - Jamestown, ND Steffes Wissota Street Stock Tour Night! A Modifieds, B Modifieds, Street Stocks, Semi-Pro Legends, Pure Stock, All Star Slingshots, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Street Stock, Junior Slingshots | Results | | Marlyn Seidler (IMCA Modified) | 1st | - | - | 3rd |
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| 8/14/2020 | Dacotah Speedway - Mandan, ND Dacotah Speedway 30th Anniversary Special Hobby Stocks, Semi-Pro Legends, IMCA Modified, IMCA Sport Compact, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 3rd | - | - | 1st |
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| 8/15/2020 | Jamestown Speedway - Jamestown, ND Guns & Hoses Night/Back to School Night A Modifieds, B Modifieds, Street Stocks, Semi-Pro Legends, Pure Stock, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Street Stock, Junior Slingshots | Results | | Marlyn Seidler (IMCA Modified) | 4th | - | - | 1st |
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| 8/21/2020 | Dacotah Speedway - Mandan, ND 12th Annual Drive to Survive with Mandan Dirt Series Hobby Stocks, Semi-Pro Legends, IMCA Modified, IMCA Sport Compact, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 3rd | - | - | 6th |
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| 8/22/2020 | Jamestown Speedway - Jamestown, ND Wissota NLRA Late Model Special A Modifieds, B Modifieds, Street Stocks, Dirt Late Models, Semi-Pro Legends, Pure Stock, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock, Junior Slingshots | Results | | Marlyn Seidler (IMCA Modified) | 3rd | - | - | 3rd |
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| 8/28/2020 | Dacotah Speedway - Mandan, ND Mandan Dirt Series CHAMPIONSHIP NIGHT Hobby Stocks, Semi-Pro Legends, IMCA Modified, IMCA Sport Compact, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 4th | - | - | 14th (DNF) |
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| 8/29/2020 | Southwest Speedway - Dickinson, ND CHAMPIONSHIP NIGHT Hobby Stocks, Semi-Pro Legends, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Sport Compact, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 6th | - | - | 5th |
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| 9/4/2020 | Gillette Thunder Speedway - Gillette, WY 20th Annual East/West Clash Night 1 IMCA Modified, IMCA Hobby Stock, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 1st | - | - | 2nd |
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| 9/5/2020 | Gillette Thunder Speedway - Gillette, WY 20th Annual East/West Clash Night 2 IMCA Modified, IMCA Hobby Stock, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 1st | - | - | 2nd |
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| 9/6/2020 | Gillette Thunder Speedway - Gillette, WY 20th Annual East/West Clash Championship Night IMCA Modified, IMCA Hobby Stock, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Late Model, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 4th | - | - | 7th |
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| 9/11/2020 | Southwest Speedway - Dickinson, ND HARVEST SHOOTOUT Hobby Stocks, Non-Winged Sprints, Semi-Pro Legends, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Sport Compact, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 1st | - | - | 1st |
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| 9/12/2020 | Southwest Speedway - Dickinson, ND HARVEST SHOOTOUT IMCA Northern SportMod: Tougher Than Dirt Tour Hobby Stocks, B Modifieds, Non-Winged Sprints, Semi-Pro Legends, IMCA Modified, IMCA Stock Car, IMCA Sport Compact, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 1st | - | - | 1st |
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| 9/25/2020 | Jamestown Speedway - Jamestown, ND 49th Annual Jamestown Stock Car Stampede A Modifieds, Midwest Modifieds, B Modifieds, Street Stocks, Semi-Pro Legends, Pure Stock, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock, Junior Slingshots | Results | | Marlyn Seidler (IMCA Modified) | 1st | - | - | 9th |
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| 9/26/2020 | Jamestown Speedway - Jamestown, ND 49th Annual Jamestown Stock Car Stampede A Modifieds, Midwest Modifieds, B Modifieds, Street Stocks, Semi-Pro Legends, Pure Stock, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock, Junior Slingshots | Results | | Marlyn Seidler (IMCA Modified) | 2nd | - | - | 7th |
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| 10/2/2020 | Dacotah Speedway - Mandan, ND Oktoberfest - Night 1 Hobby Stocks, Semi-Pro Legends, IMCA Modified, IMCA Northern SportMod, IMCA Sport Compact, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 1st | - | - | 1st |
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| 10/3/2020 | Southwest Speedway - Dickinson, ND OCTOBERFEST Hobby Stocks, Semi-Pro Legends, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Sport Compact, WISSOTA Street Stock | Results | | Marlyn Seidler (IMCA Modified) | 2nd | - | - | 1st |
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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 | | Marlyn Seidler (A Modifieds) | 2nd | - | - | 9th |
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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 | | Marlyn Seidler (A Modifieds) | 1st | - | - | 24th (DNF) |
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