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| 3/13/2021 | Big O Speedway - Ennis, TX Opening points Night DIRTcar Late Models, Factory Stocks, Hornets, 251cc+ Open Single, Limited Sport Mod, 450 Pro Single Framer, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks, Open Amateur | Results | | John Armstrong (Factory Stocks) | 3rd | - | - | 17th |
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| 3/20/2021 | Big O Speedway - Ennis, TX Weekly racing DIRTcar Late Models, Factory Stocks, Hornets, Limited Sport Mod, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | John Armstrong (Factory Stocks) | 7th | - | - | 5th |
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| 4/10/2021 | Big O Speedway - Ennis, TX DIRTcar Late Models, Factory Stocks, Hornets, Limited Sport Mod, USRA Modifieds, USRA Factory Stocks, Dirt Winged Modifieds | Results | | John Armstrong (Factory Stocks) | 7th | - | - | 18th |
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| 5/7/2021 | Big O Speedway - Ennis, TX FRIDAY NIGHT RACING 305 Sprints - Winged, DIRTcar Late Models, Factory Stocks, Limited Sport Mod | Results | | John Armstrong (Factory Stocks) | 2nd | - | - | 2nd |
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| 5/8/2021 | Big O Speedway - Ennis, TX Saturday Night at BIG O DIRTcar Late Models, Factory Stocks, Hornets, Limited Sport Mod, USRA Modifieds, USRA Factory Stocks | Results | | John Armstrong (Factory Stocks) | 2nd | - | - | 7th |
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| 6/5/2021 | Big O Speedway - Ennis, TX DIRTcar Late Models, Factory Stocks, Hornets, Limited Sport Mod, USRA Modifieds, USRA Factory Stocks, Dirt Winged Modifieds | Results | | John Armstrong (USRA Factory Stocks) | 3rd | - | - | DNS |
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| 6/12/2021 | Big O Speedway - Ennis, TX DIRTcar Late Models, Factory Stocks, Hornets, Limited Sport Mod, USRA Modifieds, USRA Factory Stocks | Results | | John Armstrong (USRA Factory Stocks) | 4th | - | - | 15th |
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| 6/17/2021 | RPM Speedway - Crandall, TX KR Cup Event Limited Sport Mod, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks, USRA Tuners | Results | | John Armstrong (USRA Factory Stocks) | 6th | - | - | 8th |
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| 6/20/2021 | Rocket Raceway Park - Petty, TX 82 Speedway Hobby Stocks, Stock Cars, 600cc Modifieds, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | John Armstrong (USRA Factory Stocks) | 5th | - | - | 7th |
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| 6/25/2021 | RPM Speedway - Crandall, TX KR Cup Round #9 Limited Sport Mod, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks, USRA Tuners, Dirt Big Block Modifieds | Results | | John Armstrong (USRA Factory Stocks) | 7th | - | - | 19th |
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| 6/26/2021 | Big O Speedway - Ennis, TX DIRTcar Late Models, Factory Stocks, Hornets, Limited Sport Mod, USRA Modifieds, USRA Factory Stocks, Dirt Winged Modifieds | Results | | John Armstrong (USRA Factory Stocks) | 5th | - | - | 13th |
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| 7/3/2021 | Big O Speedway - Ennis, TX DIRTcar Late Models, Factory Stocks, Hornets, Limited Sport Mod, USRA Factory Stocks | Results | | John Armstrong (USRA Factory Stocks) | 4th | - | - | 12th |
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| 7/10/2021 | Hunt County Raceway - Greenville, TX IMCA Mod Lites Stock Cars, Restricted 'A' Class, Winged A-Class, Super Stocks, USRA Limited Mods, USRA Factory Stocks, USRA Tuners | Results | | John Armstrong (USRA Factory Stocks) | 7th | - | 12th | DNS |
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| 7/16/2021 | Big O Speedway - Ennis, TX FRIDAY NIGHT RACES 305 Sprints - Winged, DIRTcar Late Models, Factory Stocks, Limited Sport Mod | Results | | John Armstrong (Factory Stocks) | 2nd | - | - | 3rd |
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| 7/24/2021 | Big O Speedway - Ennis, TX DIRTcar Late Models, Factory Stocks, Hornets, Lightweight SuperSport, Limited Sport Mod, USRA Modifieds, USRA Factory Stocks | Results | | John Armstrong (USRA Factory Stocks) | 6th | - | - | 12th |
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| 7/31/2021 | Big O Speedway - Ennis, TX DIRTcar Late Models, Factory Stocks, Stock Cars, Hornets, Limited Sport Mod, USRA Modifieds, USRA Factory Stocks, Dirt Winged Modifieds | Results | | John Armstrong (USRA Factory Stocks) | 6th | - | - | 9th |
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| 8/7/2021 | Big O Speedway - Ennis, TX DIRTcar Late Models, Factory Stocks, Hornets, Limited Sport Mod, USRA Modifieds, USRA Factory Stocks | Results | | John Armstrong (Factory Stocks) | 5th | - | - | 3rd |
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| 9/9/2021 | RPM Speedway - Crandall, TX Inaugural USMTS Event A Modifieds: USMTS - United States Modified Touring Series USRA Limited Mods, USRA Factory Stocks, USRA Tuners | Results | | John Armstrong (USRA Factory Stocks) | 4th | - | - | 4th |
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| 10/23/2021 | Big O Speedway - Ennis, TX Factory Stocks, MTRA Trucks | Results | | John Armstrong (Factory Stocks) | 2nd | - | - | 7th |
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