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| 4/23/2021 | Mississippi Thunder Speedway - Fountain City, WI 13th Annual Season Opener presented by Kelly Iverson Trucking Hornets, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks | Results | | Donald Martens (Hornets) | 4th | - | - | 7th |
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| 4/30/2021 | Mississippi Thunder Speedway - Fountain City, WI Weekly Racing Hornets, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks | Results | | Donald Martens (Hornets) | 1st | - | - | 12th (DNF) |
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| 5/14/2021 | Mississippi Thunder Speedway - Fountain City, WI Weekly Racing Hornets, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks | Rain Out |
| 6/11/2021 | Mississippi Thunder Speedway - Fountain City, WI Weekly Racing Hornets, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks | Results | | Donald Martens (Hornets) | 4th | - | - | 3rd |
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| 6/18/2021 | Mississippi Thunder Speedway - Fountain City, WI Redneck 100 Challenge Hornets, USRA B-Mods, USRA Hobby Stocks | Results | | Donald Martens (Hornets) | 3rd | - | - | 2nd |
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| 7/2/2021 | Mississippi Thunder Speedway - Fountain City, WI Karl Fenske Memorial Dirt Late Models, Hornets, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks | Results | | Donald Martens (Hornets) | 3rd | - | - | 1st |
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| 7/16/2021 | Mississippi Thunder Speedway - Fountain City, WI USRA Late Model Special 125cc Winged Micros, Hornets, USRA B-Mods, USRA Late Models, USRA Hobby Stocks | Results | | Donald Martens (Hornets) | 1st | - | - | 3rd |
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| 7/23/2021 | Red Cedar Speedway - Menomonie, WI Dunn County Fair Night #2 NVSR Vintage Stock Cars & Powder Puff Vintage Modifieds: Northern Vintage Stockcar Racers Vintage Full Body Stock Cars, Hornets, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Donald Martens (Hornets) | 4th | - | - | 5th |
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| 8/6/2021 | Mississippi Thunder Speedway - Fountain City, WI Weekly Racing Hornets, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks | Results | | Donald Martens (Hornets) | 6th | - | - | 2nd |
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| 10/1/2021 | Mississippi Thunder Speedway - Fountain City, WI The Great Pumpkin Race Hornets, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | Donald Martens (Hornets) | 3rd | - | - | 2nd |
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| 10/2/2021 | Mississippi Thunder Speedway - Fountain City, WI The Great Pumpkin Race Hornets, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | Donald Martens (Hornets) | 1st | - | - | 1st |
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