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| 4/24/2021 | Central Missouri Speedway - Warrensburg, MO Race #2, Weekly Racing #2 Hobby Stocks, A Modifieds, B Modifieds, Lightning Sprints, Super Stocks | Results | | Don Marrs (B Modifieds) | 1st | - | - | 6th |
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| 4/25/2021 | Lakeside Speedway - Kansas City, KS Weekly Racing #1 Factory Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds | Results | | Don Marrs (Factory Stocks) | 2nd | - | - | 5th | | Don Marrs (B Modifieds) | 6th | - | - | 12th (DNF) |
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| 4/30/2021 | Lakeside Speedway - Kansas City, KS Lakeside Speedway - WEST Dirt Super Late Models: SLMR Late Model Series Factory Stocks, Stock Cars, B Modifieds, Mod Lites | Results | | Don Marrs (Factory Stocks) | 1st | - | - | 1st | | Don Marrs (B Modifieds) | 5th | - | - | 21st (DNF) |
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| 5/1/2021 | Central Missouri Speedway - Warrensburg, MO Race #3, Seeburg Muffler presents SLMR Special Event and Weekly Racing #3 Dirt Super Late Models: SLMR Late Model Series Hobby Stocks, A Modifieds, B Modifieds, Super Stocks | Results | | Don Marrs (B Modifieds) | 6th | - | - | 6th |
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| 5/7/2021 | Lakeside Speedway - Kansas City, KS Weekly Racing #3 Factory Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds, Dirt Late Models | Results | | Don Marrs (Factory Stocks) | 1st | - | - | 2nd | | Don Marrs (B Modifieds) | 7th | - | - | 14th | | Don Marrs (Dirt Late Models) | 3rd | - | - | 5th (DNF) |
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| 5/8/2021 | Central Missouri Speedway - Warrensburg, MO Race #4, Rick Beebe Heating and Air Conditioning Race Night. Weekly Racing #4. Lightning Sprints: POWRi Midwest Lightning Sprints Hobby Stocks, A Modifieds, B Modifieds, Super Stocks | Results | | Don Marrs (B Modifieds) | 7th (DNF) | - | - | 7th |
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| 5/14/2021 | Lakeside Speedway - Kansas City, KS USMTS A Modifieds: USMTS - United States Modified Touring Series Midwest Modifieds, USRA B-Mods, USRA Stock Cars | Results | | Don Marrs (USRA B-Mods) | 6th | - | 5th | 19th |
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| 5/29/2021 | Central Missouri Speedway - Warrensburg, MO Race #7, Memorial Day Weekend Night 1 SPECIAL EVENT, POWRi Lightning Sprints and A-Mod Specials Lightning Sprints: POWRi Midwest Lightning Sprints with POWRi Minn-Kota Lightning Sprints, POWRi Southwest Lightning Sprints Midgets, Hobby Stocks, A Modifieds, B Modifieds, Super Stocks | Results | | Don Marrs (B Modifieds) | 7th | - | 10th | - |
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| 6/4/2021 | Lakeside Speedway - Kansas City, KS Weekly Racing #5 Factory Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds | Results | | Don Marrs (Factory Stocks) | 3rd | - | - | 3rd | | Don Marrs (B Modifieds) | DNS | - | - | DNS |
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| 6/5/2021 | Central Missouri Speedway - Warrensburg, MO Race #9, Joslin’s Jewelry Race Night, Weekly Racing #7 Hobby Stocks, A Modifieds, B Modifieds, Vintage Full Body Stock Cars, Super Stocks | Results | | Don Marrs (B Modifieds) | 3rd | - | - | 10th (DNF) |
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| 6/12/2021 | Central Missouri Speedway - Warrensburg, MO Race #10, Cliff Harris Warrensburg Ford Race Night, Weekly Racing #8 Lightning Sprints: POWRi Midwest Lightning Sprints Hobby Stocks, A Modifieds, B Modifieds, Super Stocks | Results | | Don Marrs (B Modifieds) | 7th | - | - | 10th |
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| 6/18/2021 | Lakeside Speedway - Kansas City, KS Weekly Racing #7 6th ANNUAL JOE BERRY CLASH OF THE B-MODS Factory Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds | Results | | Don Marrs (Factory Stocks) | 2nd | - | - | 3rd | | Don Marrs (B Modifieds) | 6th | - | 5th | 17th (DNF) |
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| 6/19/2021 | Central Missouri Speedway - Warrensburg, MO Race #11, SPECIAL EVENT featuring the USAC Midwest Wingless Racing Association! Weekly Racing #9 Non-Winged Sprints: Midwest Wingless Racing Association Hobby Stocks, A Modifieds, B Modifieds, Super Stocks | Results | | Don Marrs (B Modifieds) | 6th | - | - | 8th |
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| 7/2/2021 | Lakeside Speedway - Kansas City, KS Weekly Racing #9 4th ANNUAL GARY D STOCK CAR SPECIAL Factory Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds | Results | | Don Marrs (Factory Stocks) | 2nd | - | - | 1st | | Don Marrs (B Modifieds) | 7th | - | - | 9th |
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| 7/3/2021 | Central Missouri Speedway - Warrensburg, MO Race #13, SPECIAL EVENT, 20th Annual Tom Wilson Memorial Night 1 Hobby Stocks, A Modifieds, B Modifieds, Super Stocks | Results | | Don Marrs (B Modifieds) | 2nd | - | - | 16th (DNF) |
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| 7/9/2021 | Lakeside Speedway - Kansas City, KS Weekly Racing #10 Autism Awareness Night Factory Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds, Dirt Late Models | Results | | Don Marrs (Factory Stocks) | 1st | - | - | 5th | | Don Marrs (B Modifieds) | 5th | - | - | 9th | | Don Marrs (Dirt Late Models) | 2nd | - | - | 1st |
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| 7/16/2021 | Lakeside Speedway - Kansas City, KS Weekly Racing #11 Factory Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds | Results | | Don Marrs (Factory Stocks) | 4th | - | - | 3rd | | Don Marrs (B Modifieds) | 5th | - | - | 12th |
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| 7/23/2021 | Lakeside Speedway - Kansas City, KS Weekly Racing #12 3rd Annual Karl Tinsley Memorial Factory Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds, Dirt Late Models | Results | | Don Marrs (Factory Stocks) | 2nd | - | - | 8th | | Don Marrs (B Modifieds) | 2nd | - | - | 6th | | Don Marrs (Dirt Late Models) | 2nd | - | - | 4th (DNF) |
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| 7/24/2021 | Central Missouri Speedway - Warrensburg, MO Race #16, KMZU 'The Farm' 100.7 FM Race Night - Weekly Racing #12 Hobby Stocks, A Modifieds, B Modifieds, Super Stocks | Results | | Don Marrs (B Modifieds) | 5th | - | - | 7th |
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| 7/30/2021 | Lakeside Speedway - Kansas City, KS Lakeside Speedway - WEST Dirt Super Late Models: SLMR Late Model Series Factory Stocks, Stock Cars, Midwest Modifieds, B Modifieds | Results | | Don Marrs (Factory Stocks) | 1st | - | - | 3rd | | Don Marrs (B Modifieds) | 3rd | - | - | 9th |
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| 7/31/2021 | Central Missouri Speedway - Warrensburg, MO Race #17, Comfort Inn Race Night, Weekly Racing #13 Hobby Stocks, A Modifieds, B Modifieds, Super Stocks | Rain Out |
| 8/3/2021 | Lakeside Speedway - Kansas City, KS 360 Sprints - Winged: ASCS National with ASCS Warrior Region Stock Cars, B Modifieds, Mod Lites | Results | | Don Marrs (B Modifieds) | 6th | - | - | 10th |
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| 8/6/2021 | Lakeside Speedway - Kansas City, KS Weld Memorial Midwest Wingless Sprints Midgets: POWRi Central States Midgets Non-Winged Sprints: Midwest Wingless Racing Association Factory Stocks, Midwest Modifieds, Mod Lites | Results | | Don Marrs (Factory Stocks) | 1st | - | - | 3rd |
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| 8/7/2021 | Central Missouri Speedway - Warrensburg, MO Race #18, Pepsi presents Kids' Night Weekly Racing #14 Hobby Stocks, A Modifieds, B Modifieds, Super Stocks | Results | | Don Marrs (B Modifieds) | 8th (DNF) | - | - | 9th |
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| 8/13/2021 | Lakeside Speedway - Kansas City, KS Weekly Racing #14 Factory Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds | Results | | Don Marrs (Factory Stocks) | 1st | - | - | 1st | | Don Marrs (B Modifieds) | 4th | - | - | 10th |
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| 8/14/2021 | Central Missouri Speedway - Warrensburg, MO Race #19, SPECIAL EVENT, 5th Annual $2,000-to-Win Super Stock Showdown! Weekly Racing #15. Hobby Stocks, A Modifieds, B Modifieds, Super Stocks | Results | | Don Marrs (B Modifieds) | 4th | - | - | 12th (DNF) |
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| 8/27/2021 | Lakeside Speedway - Kansas City, KS Weekly Racing #16 Final Points Night Factory Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds | Results | | Don Marrs (Factory Stocks) | 2nd | - | - | 2nd | | Don Marrs (B Modifieds) | 5th | - | - | 5th |
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| 8/28/2021 | Central Missouri Speedway - Warrensburg, MO Race #21, Weekly Racing #17. Final “Track Points” Night Hobby Stocks, A Modifieds, B Modifieds, Super Stocks | Results | | Don Marrs (B Modifieds) | 4th | - | - | 11th |
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| 9/10/2021 | Lakeside Speedway - Kansas City, KS Tom Karrick Memorial Factory Stocks, Stock Cars, A Modifieds, B Modifieds, Mod Lites | Results | | Don Marrs (Factory Stocks) | 5th | - | - | 1st | | Don Marrs (B Modifieds) | 2nd | - | - | 7th |
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| 9/17/2021 | Lakeside Speedway - Kansas City, KS Fall Series #1 Factory Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds | Results | | Don Marrs (Factory Stocks) | 4th | - | - | 5th | | Don Marrs (B Modifieds) | 5th | - | - | 15th |
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| 9/24/2021 | Lakeside Speedway - Kansas City, KS Fall Series #2 Factory Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds, Mod Lites | Results | | Don Marrs (Factory Stocks) | 3rd | - | - | 1st | | Don Marrs (B Modifieds) | 3rd | - | - | 11th |
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| 10/2/2021 | Valley Speedway - Grain Valley, MO King of Kansas City Modified Fall Brawl Championship Hobby Stocks, Midwest Modifieds, B Modifieds, 600cc Modifieds | Results | | Don Marrs (B Modifieds) | 3rd | - | - | 4th |
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| 10/30/2021 | 81 Speedway - Park City, KS 2nd Annual USMTS Modified Spooktacular A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods, USRA Modifieds | Results | | Don Marrs (USRA B-Mods) | 9th | - | DNS | - |
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| 11/19/2021 | Springfield Raceway - Springfield, MO CASEY'S PRESENTS TURKEY BOWL XV HEATS-B MOD, MW A CLASS, MW B CLASS, Legends/Pure Stock Full Show Midwest Modifieds, Pro Legends, Limited Sport Mod, Pure Stock, USRA B-Mods | Results | | Don Marrs (Pure Stock) | 6th | - | 9th | - | | Don Marrs (USRA B-Mods) | 8th | - | - | - |
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| 11/20/2021 | Springfield Raceway - Springfield, MO CASEY'S PRESENTS TURKEY BOWL XV / HEATS & FEATURE Late Model , A Mod / B MAIN & A MAIN from Friday A Modifieds, Midwest Modifieds, Dirt Late Models, Pro Legends, Limited Sport Mod, USRA B-Mods | Results | | Don Marrs (USRA B-Mods) | - | - | 6th | - |
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