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| 5/19/2023 | Mississippi Thunder Speedway - Fountain City, WI Karl Fenske Memorial presented by Whitewater Chrysler Dodge Jeep Ram A Modifieds, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | John Feirn (USRA B-Mods) | 6th | - | - | 14th |
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| 6/2/2023 | Mississippi Thunder Speedway - Fountain City, WI Dirt Kings - Stars & Stripes 40 presented by Arcadia Chrysler Dodge Jeep Ram Dirt Late Models: Dirt Kings Late Model Tour USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars | Postponed |
| 6/9/2023 | Mississippi Thunder Speedway - Fountain City, WI USRA Late Model Special presented by Two Brother's Auto & Lamm Trucking A Modifieds, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | John Feirn (USRA B-Mods) | 3rd | - | - | 15th |
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| 6/23/2023 | Mississippi Thunder Speedway - Fountain City, WI RacinDirt Thunder Summer Series A Modifieds, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | John Feirn (USRA B-Mods) | 2nd | - | - | 19th (DNF) |
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| 6/30/2023 | Mississippi Thunder Speedway - Fountain City, WI RacinDirt Thunder Summer Series A Modifieds, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | John Feirn (USRA B-Mods) | 3rd | - | - | 19th |
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| 7/14/2023 | Mississippi Thunder Speedway - Fountain City, WI UMSS Traditional Sprints Special presented by Fountain City Ford Non-Winged Sprints, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | John Feirn (USRA B-Mods) | 5th | - | - | 22nd |
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| 7/28/2023 | Mississippi Thunder Speedway - Fountain City, WI K-Town Klash A Modifieds, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | John Feirn (USRA B-Mods) | 6th | - | - | 19th |
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| 8/4/2023 | Mississippi Thunder Speedway - Fountain City, WI LT Construction Night 125cc Winged Micros, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | John Feirn (USRA B-Mods) | 6th | - | 8th | - |
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| 8/18/2023 | Mississippi Thunder Speedway - Fountain City, WI Dirt Kings - Rumble by the River 40 presented by Hurco Companies Dirt Late Models: Dirt Kings Late Model Tour USRA B-Mods, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | John Feirn (USRA B-Mods) | 4th | - | - | 12th |
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| 8/25/2023 | Mississippi Thunder Speedway - Fountain City, WI Leighton Broadcasting Season Championship Busch Light Night A Modifieds, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | John Feirn (USRA B-Mods) | 4th | - | - | 13th |
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| 9/1/2023 | Mississippi Thunder Speedway - Fountain City, WI End of Summer Bash Dirt Super Late Models: World of Outlaws - Late Models A Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, WISSOTA Late Model, 604 Crate Late Models | Results | | John Feirn (USRA B-Mods) | 5th | - | - | 24th |
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| 9/15/2023 | Mississippi Thunder Speedway - Fountain City, WI Prelude to Stock Car Nationals USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars | Results | | John Feirn (USRA B-Mods) | 3rd | - | - | 13th |
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| 9/29/2023 | Mississippi Thunder Speedway - Fountain City, WI The Great Pumpkin Race Open Dirt Karts, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | John Feirn (USRA B-Mods) | 7th | - | 16th | - |
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| 9/30/2023 | Mississippi Thunder Speedway - Fountain City, WI The Great Pumpkin Race Open Dirt Karts, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | John Feirn (USRA B-Mods) | 7th | - | 5th | 18th |
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