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| 4/24/2021 | Route 66 Motor Speedway - Amarillo, TX Accent Auto Body Opening Night plus Car Show!! 305 Sprints - Winged, Street Stocks, Economy Late Models, USRA Limited Mods, USRA Modifieds, USRA Tuners | Results | | Kalvin King (USRA Limited Mods) | 6th | - | 2nd | 19th |
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| 5/1/2021 | Route 66 Motor Speedway - Amarillo, TX Medical Profession Night Street Stocks, Economy Late Models, USRA Limited Mods, USRA Modifieds, USRA Tuners | Results | | Kalvin King (USRA Limited Mods) | 4th | - | 1st | 10th |
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| 5/8/2021 | Route 66 Motor Speedway - Amarillo, TX Weekly Racing 305 Sprints - Winged, Street Stocks, Economy Late Models, USRA Limited Mods, USRA Modifieds | Results | | Kalvin King (USRA Limited Mods) | 2nd | - | - | 3rd |
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| 5/15/2021 | Route 66 Motor Speedway - Amarillo, TX STLMS Outlaw Late Models!! Dirt Late Models: XR Southern Storm Street Stocks, Economy Late Models, USRA Limited Mods, USRA Modifieds, USRA Tuners | Results | | Kalvin King (USRA Limited Mods) | 6th | - | 4th | 20th |
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| 5/22/2021 | Route 66 Motor Speedway - Amarillo, TX Teacher Appreciation Night! 305 Sprints - Winged, Street Stocks, Economy Late Models, USRA Limited Mods, USRA Modifieds | Results | | Kalvin King (USRA Limited Mods) | 1st | - | - | 7th |
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| 6/5/2021 | Route 66 Motor Speedway - Amarillo, TX Fan Appreciation Night!! 305 Sprints - Winged, Street Stocks, Economy Late Models, USRA Limited Mods, USRA Tuners | Results | | Kalvin King (USRA Limited Mods) | 5th | - | 2nd | 3rd |
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| 6/12/2021 | Route 66 Motor Speedway - Amarillo, TX USRA Modified Special!! USRA Modifieds: USRA American Racer Modified Series A Modifieds, Street Stocks, Economy Late Models, USRA Limited Mods, USRA Tuners | Results | | Kalvin King (USRA Limited Mods) | 1st | - | - | 18th |
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| 6/19/2021 | Route 66 Motor Speedway - Amarillo, TX Weekly Racing 305 Sprints - Winged, Street Stocks, Economy Late Models, USRA Limited Mods | Results | | Kalvin King (USRA Limited Mods) | 2nd | - | - | 1st |
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| 6/25/2021 | West Texas Raceway - Lubbock, TX FAN APPRECIATION NIGHT Sprint Cars, DIRTcar Factory Stock, Street Stocks, USRA Limited Mods, USRA Modifieds, USRA Stock Cars | Results | | Kalvin King (USRA Limited Mods) | 4th | - | - | 14th |
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| 6/26/2021 | Route 66 Motor Speedway - Amarillo, TX Police, Fire, and First Responder Night Presented by Duncan Chevrolet!!! Street Stocks, Economy Late Models, USRA Limited Mods, USRA Modifieds, USRA Tuners | Results | | Kalvin King (USRA Limited Mods) | 2nd | - | - | 8th |
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| 7/10/2021 | Route 66 Motor Speedway - Amarillo, TX Panhandle Down Syndrome Guild Night! 305 Sprints - Winged, Street Stocks, Economy Late Models, USRA Limited Mods | Results | | Kalvin King (USRA Limited Mods) | 7th | - | 2nd | 8th |
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| 7/17/2021 | Route 66 Motor Speedway - Amarillo, TX Air Compressor Solutions Street Stock Showdown!! Street Stocks, Economy Late Models, USRA Limited Mods, USRA Modifieds, USRA Tuners | Rain Out |
| 7/24/2021 | Route 66 Motor Speedway - Amarillo, TX Street Stocks, 305 Sprints - Non-Winged, Economy Late Models, USRA Limited Mods, USRA Modifieds, USRA Tuners | Results | | Kalvin King (USRA Limited Mods) | 1st | - | - | 19th |
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| 7/31/2021 | Route 66 Motor Speedway - Amarillo, TX Trucker Appreciation Night!! Street Stocks, Economy Late Models, USRA Limited Mods, USRA Modifieds, USRA Tuners | Rain Out |
| 8/7/2021 | Route 66 Motor Speedway - Amarillo, TX College Night!! 305 Sprints - Winged, Street Stocks, Economy Late Models, USRA Limited Mods | Results | | Kalvin King (USRA Limited Mods) | 1st | - | - | 5th |
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| 8/14/2021 | Route 66 Motor Speedway - Amarillo, TX Kids Night Street Stocks, Economy Late Models, USRA Limited Mods, USRA Modifieds, USRA Tuners | Results | | Kalvin King (USRA Limited Mods) | 2nd | - | - | 6th |
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| 8/21/2021 | Route 66 Motor Speedway - Amarillo, TX 2nd Annual Lyndon Moss Memorial Sprint Car Show!! 305 Sprints - Winged, Street Stocks, Economy Late Models, USRA Limited Mods | Results | | Kalvin King (USRA Limited Mods) | 2nd | - | - | 1st |
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| 8/28/2021 | Route 66 Motor Speedway - Amarillo, TX Championship Night! 305 Sprints - Winged, Street Stocks, Economy Late Models, USRA Limited Mods, USRA Modifieds, USRA Tuners | Results | | Kalvin King (USRA Limited Mods) | - | - | - | 8th |
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| 9/17/2021 | Route 66 Motor Speedway - Amarillo, TX Mark Rogers Memorial Sport Mod Special!! Street Stocks, Economy Late Models, USRA Limited Mods, USRA Modifieds, USRA Tuners | Results | | Kalvin King (USRA Limited Mods) | 1st | - | - | - |
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| 9/18/2021 | Route 66 Motor Speedway - Amarillo, TX Mark Rogers Memorial Sport Mod Special!! 305 Sprints - Winged, Street Stocks, USRA Limited Mods, USRA Modifieds, USRA Stock Cars, USRA Tuners | Results | | Kalvin King (USRA Limited Mods) | - | - | - | 5th |
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