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| 3/13/2021 | Devil's Bowl Speedway - Mesquite, TX Texas 305 RaceSaver Sprint Nationals Saturday 305 Sprints - Winged, USRA Factory Stocks | Results | | Jeff Oster (USRA Factory Stocks) | 5th | - | - | 12th |
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| 3/19/2021 | Devil's Bowl Speedway - Mesquite, TX 360 Sprints - Winged: ASCS National with ASCS Lone Star Region 305 Sprints - Winged, USRA Modifieds, USRA Factory Stocks | Results | | Jeff Oster (USRA Factory Stocks) | 8th | - | - | 14th |
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| 3/27/2021 | Devil's Bowl Speedway - Mesquite, TX 2021 Points Opener 305 Sprints - Winged, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Jeff Oster (USRA Factory Stocks) | 6th | - | - | 13th |
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| 4/2/2021 | RPM Speedway - Crandall, TX 305 Sprints - Non-Winged, Limited Sport Mod, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks, USRA Tuners | Results | | Jeff Oster (USRA Factory Stocks) | 7th | - | - | 12th |
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| 4/10/2021 | Devil's Bowl Speedway - Mesquite, TX Weekly Championship Series #2 305 Sprints - Winged, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Jeff Oster (USRA Factory Stocks) | 5th | - | - | 11th |
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| 4/24/2021 | Devil's Bowl Speedway - Mesquite, TX Weekly Championship Series #3 305 Sprints - Winged, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Jeff Oster (USRA Factory Stocks) | 8th | - | - | 13th |
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| 5/1/2021 | Southern Oklahoma Speedway - Ardmore, OK TOMS A Modifieds: TOMS - Touring Outlaw Modified Series Hobby Stocks, Stock Cars, 600cc Modifieds, Limited Sport Mod, IMCA Stock Car | Results | | Jeff Oster (Hobby Stocks) | DNS | - | 12th | 19th | | Jeff Oster (600cc Modifieds) | - | - | - | - |
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| 5/8/2021 | Devil's Bowl Speedway - Mesquite, TX DFW Local Late Model Series 305 Sprints - Winged, Dirt Late Models, USRA Limited Mods, USRA Factory Stocks | Results | | Jeff Oster (USRA Factory Stocks) | 5th | - | - | 3rd |
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| 5/15/2021 | Devil's Bowl Speedway - Mesquite, TX Weekly Championship Series #5 305 Sprints - Winged, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Jeff Oster (USRA Factory Stocks) | 3rd | - | - | 10th |
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| 5/22/2021 | Monarch Motor Speedway - Wichita Falls, TX Winged Sprints: Bandits Outlaw Sprint Series B Modifieds, Pony Stock, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks, USRA Tuners | Results | | Jeff Oster (USRA Factory Stocks) | 5th | - | - | 3rd |
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| 5/28/2021 | Boyd Raceway - Boyd, TX Red River Modified Tour Factory Stocks, A Modifieds, Street Stocks, Limited Sport Mod, Sport Compact, IMCA Sport Compact | Results | | Jeff Oster (Factory Stocks) | 8th | - | - | 18th |
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| 5/30/2021 | Lonestar Speedway - Kilgore, TX Memorial Day Showdown Factory Stocks, A Modifieds, B Modifieds, Dirt Late Models, Sport Compact | Results | | Jeff Oster (Factory Stocks) | 7th | - | 10th | - |
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| 6/5/2021 | Hunt County Raceway - Greenville, TX IMCA Mod Lites A Modifieds: TOMS - Touring Outlaw Modified Series Stock Cars, Restricted 'A' Class, Winged A-Class, Super Stocks, USRA Limited Mods, USRA Factory Stocks, USRA Tuners | Results | | Jeff Oster (USRA Factory Stocks) | - | - | - | - |
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| 6/11/2021 | Buffalo Creek Speedway - Edgewood, TX USRA Limited Mods, USRA Factory Stocks, USRA Tuners | Results | | Jeff Oster (USRA Factory Stocks) | - | - | - | 13th (DNF) |
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| 6/12/2021 | Devil's Bowl Speedway - Mesquite, TX Weekly Championship Series #8 305 Sprints - Winged, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Jeff Oster (USRA Factory Stocks) | 6th | - | - | 13th |
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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 | | Jeff Oster (USRA Factory Stocks) | 5th | - | - | 14th |
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| 6/19/2021 | Devil's Bowl Speedway - Mesquite, TX Weekly Championship Series #9 305 Sprints - Winged, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Jeff Oster (USRA Factory Stocks) | 4th | - | - | 7th |
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| 7/3/2021 | Hunt County Raceway - Greenville, TX S.T.E.M.S.(Southern Topless Economy Modifieds) Fireworks Stock Cars, Restricted 'A' Class, Winged A-Class, Limited Modified, Super Stocks, USRA Limited Mods, USRA Factory Stocks, USRA Tuners | Results | | Jeff Oster (USRA Factory Stocks) | 4th | - | - | 13th |
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| 7/10/2021 | Devil's Bowl Speedway - Mesquite, TX Weekly Championship Series #12 305 Sprints - Winged, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Jeff Oster (USRA Factory Stocks) | 7th | - | - | 13th |
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| 7/17/2021 | Devil's Bowl Speedway - Mesquite, TX Weekly Championship Series #13 305 Sprints - Winged, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Jeff Oster (USRA Factory Stocks) | 1st | - | - | 3rd |
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| 7/24/2021 | Devil's Bowl Speedway - Mesquite, TX Weekly Championship Series #14 305 Sprints - Winged, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Jeff Oster (USRA Factory Stocks) | 3rd | - | - | 2nd |
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| 7/31/2021 | Devil's Bowl Speedway - Mesquite, TX Weekly Championship Series #15 305 Sprints - Winged, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Jeff Oster (USRA Factory Stocks) | 1st | - | - | 11th |
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| 8/21/2021 | Devil's Bowl Speedway - Mesquite, TX Weekly Championship Series #17 305 Sprints - Winged, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Jeff Oster (USRA Factory Stocks) | 2nd | - | - | 5th |
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| 8/28/2021 | Devil's Bowl Speedway - Mesquite, TX 2021 Championship Finals 305 Sprints - Winged, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Jeff Oster (USRA Factory Stocks) | 5th | - | - | 12th |
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