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| 5/15/2021 | Thunderbird Raceway - Muskegon, MI IMCA Modifieds $1000 to win presented by Deb's Cafe & Full Show Dirt Super Late Models, Factory Stocks, Stock Cars, A Modifieds, Pro Late Model, Mini Wedge, Mini Outlaws, Sport Compact | Results | | Bill May (Sport Compact) | - | - | - | - |
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| 5/22/2021 | Thunderbird Raceway - Muskegon, MI Allstar Performance Street Stock Challenge $750 to win & Full Show Dirt Super Late Models, Factory Stocks, Stock Cars, A Modifieds, Pro Late Model, Mini Wedge, Mini Outlaws, Sport Compact | Results | | Bill May (Sport Compact) | 7th | - | - | 11th |
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| 9/10/2021 | Thunderbird Raceway - Muskegon, MI Rolling Thunder Dirt Super Late Models, Factory Stocks, Stock Cars, A Modifieds, Enduro, Pro Late Model, Mini Wedge, Mini Outlaws, Sport Compact | Results | | Bill May (Enduro) | 16th | - | - | - |
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