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| 3/10/2021 | Humboldt Speedway - Humboldt, KS Battle at the Bullring Practice Dirt Super Late Models, Factory Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds, Sport Compact, USRA B-Mods, USRA Modifieds | Rain Out |
| 3/24/2021 | Humboldt Speedway - Humboldt, KS KOA and Battle Practice A Modifieds: USMTS - United States Modified Touring Series B Modifieds, USRA B-Mods, USRA Modifieds, USRA Stock Cars | Results | | Randy Zimmerman (USRA B-Mods) | - | - | - | - |
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| 3/25/2021 | Humboldt Speedway - Humboldt, KS King Of America and Battle at the Bullring Night 1 A Modifieds: USMTS - United States Modified Touring Series B Modifieds, USRA B-Mods, USRA Modifieds, USRA Stock Cars | Results | | Randy Zimmerman (USRA B-Mods) | 6th | - | - | - |
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| 3/26/2021 | Humboldt Speedway - Humboldt, KS King Of America $5,000 to win + Battle Qualifying A Modifieds: USMTS - United States Modified Touring Series B Modifieds, USRA B-Mods, USRA Stock Cars | Results | | Randy Zimmerman (USRA B-Mods) | 8th | - | - | - |
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| 3/27/2021 | Humboldt Speedway - Humboldt, KS King Of America $20,000 to win, Battle at the Bullring $10,00 to win A Modifieds: USMTS - United States Modified Touring Series B Modifieds, USRA B-Mods, USRA Modifieds, USRA Stock Cars | Results | | Randy Zimmerman (USRA B-Mods) | - | - | - | - |
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| 5/29/2021 | Legit Speedway Park - West Plains, MO Dirt Late Models: Cash Money Dirt Late Model Series Hobby Stocks, A Modifieds, Super Stocks | Results | | Randy Zimmerman (A Modifieds) | 4th | - | - | 12th |
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| 7/31/2021 | Springfield Raceway - Springfield, MO WEEKLY RACING & MECHANICS RACES Stock Cars, A Modifieds, Midwest Modifieds, Pro Legends, Limited Sport Mod, Pure Stock, USRA B-Mods | Results | | Randy Zimmerman (A Modifieds) | - | - | - | - |
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| 8/6/2021 | Humboldt Speedway - Humboldt, KS USMTS $10,000 to win + Humboldt Speedway Weekly Racing Series A Modifieds: USMTS - United States Modified Touring Series Factory Stocks, Midwest Modifieds, USRA B-Mods, USRA Tuners | Results | | Randy Zimmerman (A Modifieds) | 7th | - | 16th | - |
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| 8/14/2021 | Legit Speedway Park - West Plains, MO 6th Annual Camber Classic Dirt Super Late Models, Hobby Stocks, A Modifieds, Economy Late Models, Limited Sport Mod, Super Stocks | Results | | Randy Zimmerman (A Modifieds) | 5th | - | - | 11th |
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| 8/28/2021 | Springfield Raceway - Springfield, MO CEDAR CREEK BEEF JERKY WEEKLY RACING Stock Cars, A Modifieds, Midwest Modifieds, Pro Legends, Limited Sport Mod, Pure Stock, USRA B-Mods | Results | | Randy Zimmerman (A Modifieds) | 5th | - | - | 7th |
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| 9/17/2021 | Springfield Raceway - Springfield, MO Midwest Sheetmetal Route 66 Showdown Dirt Late Models: Cash Money Dirt Late Model Series Stock Cars, A Modifieds, Midwest Modifieds, Limited Sport Mod | Results | | Randy Zimmerman (A Modifieds) | 1st | - | - | 4th |
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| 9/22/2021 | Batesville Motor Speedway - Locust Grove, AR 5th Annual Race 4 Hope 71 IMCA Modified | Results | | Randy Zimmerman (IMCA Modified) | 4th | - | 22nd | - |
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| 9/23/2021 | Batesville Motor Speedway - Locust Grove, AR 5th Annual Race 4 Hope 71 IMCA Modified | Results | | Randy Zimmerman (IMCA Modified) | 5th | - | - | - |
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| 9/24/2021 | Batesville Motor Speedway - Locust Grove, AR 5th Annual Race 4 Hope 71 IMCA Modified | Results | | Randy Zimmerman (IMCA Modified) | 5th | - | - | - |
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| 9/25/2021 | Batesville Motor Speedway - Locust Grove, AR 5th Annual Race 4 Hope 71 IMCA Modified | Results | | Randy Zimmerman (IMCA Modified) | - | - | - | - |
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| 10/16/2021 | Beatrice Speedway - Beatrice, NE OctoberFest Night 2 Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Sport Compact | Results | | Randy Zimmerman (A Modifieds) | 3rd | - | - | 16th |
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