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| 5/1/2021 | Riverside International Speedway - West Memphis, AR Spring Fling Special 360 Sprints - Winged, 305 Sprints - Winged, Stock Cars, A Modifieds, Winged A-Class | Results | | Brandon Poppenheimer (A Modifieds) | 1st | - | - | 13th (DNF) |
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| 5/8/2021 | Riverside International Speedway - West Memphis, AR Living Legends and Holcomb 100 360 Sprints - Winged, 305 Sprints - Winged, Stock Cars, Dirt Late Models | Results | | Brandon Poppenheimer (Dirt Late Models) | 2nd | - | - | 3rd |
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| 5/15/2021 | Riverside International Speedway - West Memphis, AR LMRA LATE MODELS 305 Sprints - Winged, Stock Cars, A Modifieds, Winged A-Class, Dirt Late Models | Results | | Brandon Poppenheimer (A Modifieds) | 1st | - | - | 13th (DNF) | | Brandon Poppenheimer (Dirt Late Models) | 2nd | - | - | 4th |
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| 5/22/2021 | Riverside International Speedway - West Memphis, AR 305 Sprints - Winged, Stock Cars, A Modifieds, Winged A-Class, Dirt Late Models | Results | | Brandon Poppenheimer (A Modifieds) | 1st | - | - | 8th (DNF) | | Brandon Poppenheimer (Dirt Late Models) | 2nd | - | - | 2nd |
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| 5/29/2021 | Riverside International Speedway - West Memphis, AR USCS "Duel at the Ditch" Sprint Car Speedweek Round #2 360 Sprints - Winged: USCS United Sprint Car Series 305 Sprints - Winged, Stock Cars, A Modifieds | Results | | Brandon Poppenheimer (A Modifieds) | 3rd | - | - | 2nd |
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| 6/12/2021 | Riverside International Speedway - West Memphis, AR Power I Midgets Midgets: POWRi Economy Midgets: POWRi Outlaw Midgets 305 Sprints - Winged, Stock Cars, A Modifieds, Dirt Late Models | Results | | Brandon Poppenheimer (A Modifieds) | 1st | - | - | 2nd | | Brandon Poppenheimer (Dirt Late Models) | 1st | - | - | 1st |
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| 6/19/2021 | Riverside International Speedway - West Memphis, AR Greg Hodnett Memorial 360 Sprints - Winged, 305 Sprints - Winged, Stock Cars, Dirt Late Models, Vintage Modifieds | Results | | Brandon Poppenheimer (Dirt Late Models) | 1st | - | - | 4th |
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| 7/3/2021 | Riverside International Speedway - West Memphis, AR 360 Sprints - Winged: USCS United Sprint Car Series 305 Sprints - Winged, Stock Cars, A Modifieds, Winged A-Class | Results | | Brandon Poppenheimer (A Modifieds) | 4th | - | - | 4th |
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| 7/25/2021 | Riverside International Speedway - West Memphis, AR ASCS Sprint Week - Night 3 360 Sprints - Winged: ASCS National Stock Cars, Dirt Late Models | Results | | Brandon Poppenheimer (Dirt Late Models) | 1st | - | - | 2nd |
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| 7/31/2021 | Riverside International Speedway - West Memphis, AR 305 Sprints - Winged, Stock Cars, A Modifieds, Winged A-Class, Dirt Late Models | Results | | Brandon Poppenheimer (A Modifieds) | 2nd | - | - | 2nd | | Brandon Poppenheimer (Dirt Late Models) | 1st | - | - | 1st |
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| 8/7/2021 | Riverside International Speedway - West Memphis, AR Cody Burks Memorial 305 Sprints - Winged, Stock Cars, A Modifieds, Dirt Late Models | Results | | Brandon Poppenheimer (A Modifieds) | 3rd | - | - | 1st | | Brandon Poppenheimer (Dirt Late Models) | 1st | - | - | 15th |
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| 8/28/2021 | Riverside International Speedway - West Memphis, AR Round 1 Jimmy Huffman Memorial Cup and Modified Special 305 Sprints - Winged, Stock Cars, A Modifieds, Winged A-Class, Dirt Late Models | Results | | Brandon Poppenheimer (A Modifieds) | 1st | - | - | 2nd | | Brandon Poppenheimer (Dirt Late Models) | 1st | - | - | 2nd |
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| 9/4/2021 | Riverside International Speedway - West Memphis, AR Round 3 Jimmy Huffman Memorial Cup 305 Sprints - Winged, Stock Cars, A Modifieds, Winged A-Class, Dirt Late Models | Results | | Brandon Poppenheimer (A Modifieds) | 4th | - | - | 2nd | | Brandon Poppenheimer (Dirt Late Models) | 2nd | - | - | 2nd |
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| 9/11/2021 | Riverside International Speedway - West Memphis, AR LM & MOD Special Stock Cars, A Modifieds, Dirt Late Models | Results | | Brandon Poppenheimer (A Modifieds) | 3rd | - | - | 1st | | Brandon Poppenheimer (Dirt Late Models) | 1st | - | - | 3rd |
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| 9/25/2021 | Riverside International Speedway - West Memphis, AR Fall Nationals 360 Sprints - Winged, 305 Sprints - Winged, Stock Cars, Winged A-Class, Dirt Late Models | Results | | Brandon Poppenheimer (Dirt Late Models) | 1st | - | - | 1st |
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| 10/8/2021 | Riverside International Speedway - West Memphis, AR USCS Fall Nationals and Flip Flop 50 Nite #1 360 Sprints - Winged: USCS United Sprint Car Series 305 Sprints - Winged, Stock Cars, A Modifieds, Winged A-Class, CRUSA Modified Sportsman | Results | | Brandon Poppenheimer (CRUSA Modified Sportsman) | 9th (DNF) | - | - | 4th |
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| 10/9/2021 | Riverside International Speedway - West Memphis, AR USCS Fall Nationals and Flip Flop 50 Finale 360 Sprints - Winged: USCS United Sprint Car Series 305 Sprints - Winged, Stock Cars, Winged A-Class, Dirt Late Models | Results | | Brandon Poppenheimer (Dirt Late Models) | 2nd | - | - | 11th |
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| 10/17/2021 | Riverside International Speedway - West Memphis, AR Grassroots National 305 Sprints - Winged, Stock Cars, A Modifieds, Winged A-Class, Dirt Late Models | Results | | Brandon Poppenheimer (A Modifieds) | 1st | - | - | 1st | | Brandon Poppenheimer (Dirt Late Models) | 1st | - | - | 1st |
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