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| 7/15/2023 | Owosso Speedway - Owosso, MI $10K TO WIN HAMMER SERIES OUTLAW SUPERS!! $14 ADULT TICKET Street Stocks, Supermodifieds, Hornets, Asphalt Economy Trucks, Sport Compact, Pure Stock, IMCA Sport Compact | Results | | Justin Holloway (Supermodifieds) | - | - | - | 12th |
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| 8/26/2023 | Owosso Speedway - Owosso, MI The 12th Annual Ron Hauser Memorial at Owosso Speedway! $10K to Win! Street Stocks, Supermodifieds, Hornets, Asphalt Economy Trucks, Sport Compact, Pure Stock, IMCA Sport Compact | Results | | Justin Holloway (Supermodifieds) | - | - | - | 9th |
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| 9/22/2023 | Owosso Speedway - Owosso, MI OWOSSO NATIONALS PRACTICE/CAMPING/LIVE MUSIC! A Modifieds, Street Stocks, Supermodifieds, Hornets, Asphalt Economy Trucks, Asphalt Sportsman Late Models, Mini Wedge, Sport Compact, Pure Stock, IMCA Sport Compact | Results | | Justin Holloway (Supermodifieds) | - | - | - | - |
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| 9/23/2023 | Owosso Speedway - Owosso, MI THE ICONIC OWOSSO NATIONALS!!! (6pm start time) A Modifieds, Street Stocks, Supermodifieds, Hornets, Asphalt Economy Trucks, Asphalt Sportsman Late Models, Sport Compact, Pure Stock, IMCA Sport Compact | Results | | Justin Holloway (Asphalt Late Models) | - | - | - | - | | Justin Holloway (Supermodifieds) | - | - | 5th | - | | Justin Holloway (Asphalt Limited Late Models) | - | - | - | - |
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