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| 4/2/2021 | Winston Speedway - Rothbury, MI Player Hater Asphalt Mini Stocks, Stock Cars, Sportsmans, Street Stocks, Dirt Late Models, Hornets, Mini Wedge, IMCA Modified | Results | | Calvin Stemler (IMCA Modified) | 5th | - | - | 21st |
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| 4/17/2021 | Thunderbird Raceway - Muskegon, MI Dirt Super Late Models, Factory Stocks, Stock Cars, A Modifieds, Pro Late Model, Mini Wedge, Mini Outlaws, Sport Compact | Results | | Calvin Stemler (A Modifieds) | 4th | - | - | 9th |
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| 4/23/2021 | I-96 Speedway - Lake Odessa, MI Non Wing Challenge Night 1 DIRTcar Late Models, B Modifieds, Street Stocks, 410 Sprints - Non-Winged, Sport Compact | Results | | Calvin Stemler (B Modifieds) | 7th | - | - | 11th |
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| 4/30/2021 | I-96 Speedway - Lake Odessa, MI Non Wing Challenge Night 2 DIRTcar Late Models, B Modifieds, Street Stocks, 410 Sprints - Non-Winged, Mini Wedge, Mini Outlaws, Sport Compact | Results | | Calvin Stemler (B Modifieds) | 2nd | - | - | 18th (DNF) |
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| 5/1/2021 | Merritt Speedway - Merritt, MI Opening Night at Merritt Speedway DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Hobby Stocks, Stock Cars, Sportsmans, B Modifieds, Mini Wedge, Mini Outlaws | Results | | Calvin Stemler (B Modifieds) | 1st | - | - | 18th |
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| 5/12/2021 | Crystal Motor Speedway - Crystal, MI Eastern IMCA Allstars - IMCA Modifieds, IMCA Stock Cars, and Cyber Stock Hobby Stocks, A Modifieds, Sport Compact, IMCA Stock Car | Results | | Calvin Stemler (A Modifieds) | 6th | - | 4th | 17th |
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| 5/21/2021 | I-96 Speedway - Lake Odessa, MI IMCA Modified Challenge Night DIRTcar Late Models, B Modifieds, Street Stocks, Mini Wedge, Mini Outlaws, Sport Compact | Results | | Calvin Stemler (B Modifieds) | 8th | - | 6th | - |
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| 5/29/2021 | Merritt Speedway - Merritt, MI MEMORIAL DAY CELEBRATION - DAY 1 DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Hobby Stocks, Stock Cars, Sportsmans, B Modifieds, Mini Wedge, Mini Outlaws | Results | | Calvin Stemler (B Modifieds) | 2nd | - | - | 4th |
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| 5/30/2021 | Merritt Speedway - Merritt, MI MEMORIAL DAY - DAY 2 & ALLSTAR PERFORMANCE CHALLENGE SERIES RACE #4 & UMP MODS $2000 TO WIN DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Hobby Stocks, Stock Cars, Sportsmans, B Modifieds, Mini Wedge, Mini Outlaws | Results | | Calvin Stemler (B Modifieds) | - | - | - | 3rd |
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| 6/5/2021 | Crystal Motor Speedway - Crystal, MI IMCA Challenge - $1252 to Win Sponsored by Lane Automotive-Allstar Performance Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Junior 1 Lites Dirt Karts, Dirt Pro Trucks, Mini Wedge, Sport Compact | Results | | Calvin Stemler (A Modifieds) | 1st | - | - | 11th |
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| 6/19/2021 | Crystal Motor Speedway - Crystal, MI Full Show - Sponsored by Carson City Lumber Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Dirt Pro Trucks, Sport Compact | Results | | Calvin Stemler (A Modifieds) | 6th | - | 1st | 15th |
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| 7/3/2021 | Merritt Speedway - Merritt, MI INDEPENDENCE DAY CELEBRATION - DAY 1 DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Hobby Stocks, Sportsmans, B Modifieds, Mini Wedge, Mini Outlaws | Results | | Calvin Stemler (B Modifieds) | 3rd | - | - | 11th |
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| 7/4/2021 | Merritt Speedway - Merritt, MI INDEPENDENCE DAY - DAY 2 | ALLSTAR PERFORMANCE CHALLENGE SERIES RACES DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Hobby Stocks, Sportsmans, B Modifieds, Mini Wedge, Mini Outlaws | Results | | Calvin Stemler (B Modifieds) | 1st | - | - | 7th |
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| 7/9/2021 | I-96 Speedway - Lake Odessa, MI Autograph Night DIRTcar Late Models, B Modifieds, Street Stocks, Mini Wedge, Mini Outlaws, Sport Compact | Results | | Calvin Stemler (B Modifieds) | 6th | - | - | 8th |
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| 7/10/2021 | Thunderbird Raceway - Muskegon, MI $500 to win Warriors Presented by NIX's Trucking-$1000 to Win IMCA Modified Dirt Super Late Models, Factory Stocks, Stock Cars, A Modifieds, Pro Late Model, Mini Wedge, Mini Outlaws, Sport Compact | Results | | Calvin Stemler (A Modifieds) | 1st | - | - | 14th |
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| 7/17/2021 | Crystal Motor Speedway - Crystal, MI YES 2 KIDS - Autographs from 6:00-7:00 p.m. Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Junior 1 Lites Dirt Karts, Dirt Pro Trucks, Mini Wedge, Sport Compact | Results | | Calvin Stemler (A Modifieds) | 8th | - | - | 13th |
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| 7/31/2021 | Crystal Motor Speedway - Crystal, MI Lightning Sprints: Great Lakes Lightning Sprints Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Junior 1 Lites Dirt Karts, Dirt Pro Trucks, Mini Wedge, Sport Compact | Results | | Calvin Stemler (A Modifieds) | 5th | - | - | 6th |
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| 8/6/2021 | Merritt Speedway - Merritt, MI 33RD ANNUAL WOOD TIC - DAY 1 DIRTcar Late Models: Allstar Performance Challenge Series DIRTcar UMP Modifieds, Factory Stocks, Hobby Stocks, Sportsmans, B Modifieds, Mini Wedge, Mini Outlaws | Results | | Calvin Stemler (B Modifieds) | 4th | - | - | - |
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| 8/7/2021 | Merritt Speedway - Merritt, MI 33RD ANNUAL WOOD TIC - DAY 2 | ALLSTAR PERFORMANCE CHALLENGE SERIES RACES DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Hobby Stocks, Sportsmans, B Modifieds, Mini Wedge, Mini Outlaws | Results | | Calvin Stemler (B Modifieds) | - | - | - | 16th |
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| 8/14/2021 | Crystal Motor Speedway - Crystal, MI G.L.O.W. Vintage Modifieds - Sponsored by Engine Pro Hobby Stocks, A Modifieds, Street Stocks, Dirt Late Models, Junior 1 Lites Dirt Karts, Dirt Pro Trucks, Mini Wedge, Sport Compact | Results | | Calvin Stemler (A Modifieds) | 6th | - | - | 10th |
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| 9/5/2021 | Crystal Motor Speedway - Crystal, MI Outlaw Late Models & Open Modifieds Dirt Super Late Models, Hobby Stocks, B Modifieds, Street Stocks, Dirt Late Models, 410 Sprints - Non-Winged, Lightning Sprints, Dirt Pro Trucks, Sport Compact | Results | | Calvin Stemler (B Modifieds) | 4th | - | - | 14th |
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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 | | Calvin Stemler (A Modifieds) | 7th | - | - | 21st (DNF) |
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