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| 5/1/2021 | Devils Lake Speedway - Crary, ND May Day Non-Winged Sprints, Pony Stock, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 4th | - | - | 10th |
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| 5/7/2021 | River Cities Speedway - Grand Forks, ND Season Opener - Premier Racing Series 410 Sprints - Winged: Northern Outlaw Sprint Association B Modifieds, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 5th | - | - | 7th |
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| 5/8/2021 | Devils Lake Speedway - Crary, ND Mothers Day Weekend Non-Winged Sprints, Pony Stock, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 2nd | - | - | 7th |
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| 5/15/2021 | Jamestown Speedway - Jamestown, ND 2021 Jamestown Speedway Season Opener Semi-Pro Legends, Pure Stock, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Street Stock, Junior Slingshots | Results | | Tanner Theis (WISSOTA Midwest Mods) | 2nd | - | - | 12th |
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| 5/21/2021 | I-94 Speedway - Fergus Falls, MN NLRA Late Model Special Hornets, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 3rd | - | - | 15th |
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| 5/22/2021 | Devils Lake Speedway - Crary, ND Non-Winged Sprints, Pony Stock, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 5th | - | - | 18th (DNF) |
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| 5/29/2021 | Devils Lake Speedway - Crary, ND Non-Winged Sprints, Pony Stock, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 7th | - | - | 9th |
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| 6/4/2021 | I-94 Speedway - Fergus Falls, MN Prelude to the Dick Johanneck King of Dirt Hornets, Economy Late Models, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 7th | - | 5th | - |
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| 6/5/2021 | I-94 Speedway - Fergus Falls, MN The Dick Johanneck King of Dirt Special Hornets, Economy Late Models, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 6th | - | 2nd | 16th |
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| 6/6/2021 | Sheyenne Speedway - Lisbon, ND SPEEDFEST + A-MODS Pro Legends, Sport Compact, Pure Stock, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 3rd | - | - | 6th |
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| 6/12/2021 | Devils Lake Speedway - Crary, ND Rebel Tour Lightning Sprints: POWRi Minn-Kota Lightning Sprints Midgets, Non-Winged Sprints, Pure Stock, WISSOTA Midwest Mods | Results | | Tanner Theis (WISSOTA Midwest Mods) | 4th | - | - | 14th |
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| 6/19/2021 | Jamestown Speedway - Jamestown, ND JRMC Night & REBEL WISSOTA MW Modified Tour Semi-Pro Legends, Pure Stock, IMCA Modified, WISSOTA Midwest Mods, Junior Slingshots | Results | | Tanner Theis (WISSOTA Midwest Mods) | 7th | - | 3rd | 19th |
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| 6/26/2021 | Greenbush Race Park - Greenbush, MN MWM Special WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Pure Stock, WISSOTA Street Stock | Rain Out |
| 7/1/2021 | Norman County Raceway - Ada, MN King Pin Clash Semi-Pro Legends, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, WISSOTA Midwest Mods | Results | | Tanner Theis (WISSOTA Midwest Mods) | 5th | - | - | 5th |
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| 7/2/2021 | River Cities Speedway - Grand Forks, ND Mid Season Track Championship 410 Sprints - Winged: Northern Outlaw Sprint Association B Modifieds, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 3rd | - | - | 10th |
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| 7/4/2021 | Jamestown Speedway - Jamestown, ND Fireworks Spectacular Race Night Semi-Pro Legends, Pure Stock, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Street Stock, Junior Slingshots | Results | | Tanner Theis (WISSOTA Midwest Mods) | 7th | - | - | 26th |
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| 7/8/2021 | River Cities Speedway - Grand Forks, ND Wayne Anderson Cup Race #1 - NLRA Tour 410 Sprints - Winged: Northern Outlaw Sprint Association B Modifieds, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 1st | - | - | 3rd |
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| 7/9/2021 | River Cities Speedway - Grand Forks, ND Wayne Anderson Cup Race #2 - Premier Racing Series/Celebrate Dirt! 410 Sprints - Winged: Northern Outlaw Sprint Association B Modifieds, 305 Sprints - Non-Winged, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 6th | - | - | 9th |
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| 7/11/2021 | Buffalo River Speedway - Glyndon, MN July 11th 2021 Dirt Late Models, Pro Legends, Sport Compact, IMCA Stock Car, IMCA Hobby Stock, WISSOTA Midwest Mods | Results | | Tanner Theis (WISSOTA Midwest Mods) | 4th | - | - | 14th |
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| 7/16/2021 | I-94 Speedway - Fergus Falls, MN Steffes Street Stock Tour plus Super Stock Special Hornets, Economy Late Models, WISSOTA Midwest Mods, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 1st | - | - | 5th |
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| 7/17/2021 | I-94 Speedway - Fergus Falls, MN World of Outlaw Late Models and Steffes Street Stock Special Dirt Super Late Models: World of Outlaws - Late Models WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 2nd | - | - | 19th (DNF) |
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| 7/23/2021 | River Cities Speedway - Grand Forks, ND Big Motor Mania & Hall of Fame Night 410 Sprints - Winged: Northern Outlaw Sprint Association B Modifieds, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model | Results | | Tanner Theis (WISSOTA Midwest Mods) | 7th | - | 3rd | - |
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| 7/24/2021 | Greenbush Race Park - Greenbush, MN Rebel MWM Tour and RV Mod Tour WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Pure Stock, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 6th | - | 1st | 18th |
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| 7/30/2021 | River Cities Speedway - Grand Forks, ND Premier Racing Series - Lighting Sprints/Wingless Sprints Midgets: POWRi Lightning Sprints: POWRi Minn-Kota Lightning Sprints 305 Sprints - Non-Winged, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 2nd | - | - | 7th |
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| 7/31/2021 | Devils Lake Speedway - Crary, ND Walhalla Building Center Golden Hammer MWM Challenge plus NLRA Special Pure Stock, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 6th | - | - | 13th |
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| 8/13/2021 | River Cities Speedway - Grand Forks, ND Premier Racing Series - Lighting Sprint Special 410 Sprints - Winged: Northern Outlaw Sprint Association Midgets: POWRi Lightning Sprints: POWRi Minn-Kota Lightning Sprints WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 6th | - | - | 8th |
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| 8/21/2021 | Jamestown Speedway - Jamestown, ND 3rd Annual Jeff Carpenter's Memorial Semi-Pro Legends, Pure Stock, IMCA Modified, WISSOTA Midwest Mods, WISSOTA Street Stock, Junior Slingshots | Results | | Tanner Theis (WISSOTA Midwest Mods) | 5th | - | 2nd | 19th |
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| 8/22/2021 | Sheyenne Speedway - Lisbon, ND $5,000 REBEL MW MOD TOUR FINALE Pro Legends, Sport Compact, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 2nd | - | - | 18th |
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| 9/4/2021 | Devils Lake Speedway - Crary, ND Brekke Aviation Night Track Championship Non-Winged Sprints, Pony Stock, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 1st | - | - | 7th |
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| 9/5/2021 | Devils Lake Speedway - Crary, ND Points Championship plus Powder Puff and Mechanic Races Non-Winged Sprints, Pony Stock, Pure Stock, WISSOTA Midwest Mods, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 2nd | - | - | 4th |
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| 9/9/2021 | River Cities Speedway - Grand Forks, ND Prelude to the Johnny - NLRA Late Model Tour Championship B Modifieds, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 4th | - | - | 10th |
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| 9/10/2021 | River Cities Speedway - Grand Forks, ND John Seitz Memorial Night 1 & Wayne Anderson Cup Finale 410 Sprints - Winged: Northern Outlaw Sprint Association B Modifieds, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 5th | - | 5th | 14th |
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| 9/15/2021 | I-94 Speedway - Fergus Falls, MN WISSOTA 100 A Modifieds, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 5th | - | - | - |
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| 9/16/2021 | I-94 Speedway - Fergus Falls, MN WISSOTA 100 WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 2nd | - | - | 22nd |
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| 9/17/2021 | I-94 Speedway - Fergus Falls, MN WISSOTA 100 WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 3rd | - | - | 4th |
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| 9/18/2021 | I-94 Speedway - Fergus Falls, MN WISSOTA 100 A Modifieds, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | - | - | - | 17th |
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| 9/24/2021 | Jamestown Speedway - Jamestown, ND 50th Annual Jamestown Stock Car Stampede B Modifieds, Semi-Pro Legends, Pure Stock, IMCA Modified, IMCA Northern SportMod, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock, Junior Slingshots | Results | | Tanner Theis (WISSOTA Midwest Mods) | 4th | - | - | 20th |
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| 9/25/2021 | Jamestown Speedway - Jamestown, ND 50th Annual Jamestown Stock Car Stampede B Modifieds, Semi-Pro Legends, Pure Stock, IMCA Modified, IMCA Northern SportMod, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock, Junior Slingshots | Results | | Tanner Theis (WISSOTA Midwest Mods) | 1st | - | - | 5th |
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| 10/2/2021 | Devils Lake Speedway - Crary, ND Fall Last Call Spooktacular Lightning Sprints, Pure Stock, WISSOTA Midwest Mods, WISSOTA Late Model, WISSOTA Street Stock | Results | | Tanner Theis (WISSOTA Midwest Mods) | 2nd | - | - | 5th |
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