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| 4/17/2021 | Shawano Speedway - Shawano, WI Dirt Kings Late Model Series Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Dirt 4 cyl Modifieds | Results | | Andy Klosterman (B Modifieds) | 5th | - | - | 11th |
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| 4/24/2021 | Shawano Speedway - Shawano, WI Regular Points Night-Dirt Kings Weather Date Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Dirt 4 cyl Modifieds | Results | | Andy Klosterman (B Modifieds) | 1st | - | - | 8th |
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| 5/1/2021 | Shawano Speedway - Shawano, WI Regular Points Night Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Dirt 4 cyl Modifieds | Results | | Andy Klosterman (B Modifieds) | 3rd | - | - | 8th |
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| 5/7/2021 | Outagamie Speedway - Seymour, WI 2021 Season Opener by Klink Equipment Street Stocks, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Sport Compact | Results | | Andy Klosterman (IMCA Northern SportMod) | 10th | - | 4th | 18th |
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| 5/15/2021 | Shawano Speedway - Shawano, WI Regular Points Night Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Dirt 4 cyl Modifieds | Rain Out |
| 5/29/2021 | Shawano Speedway - Shawano, WI Regular Points Night - Spectator Eliminators Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Dirt 4 cyl Modifieds | Results | | Andy Klosterman (B Modifieds) | 8th (DNF) | - | - | 17th (DNF) |
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| 6/5/2021 | Shawano Speedway - Shawano, WI Ladies Night - first 200 women get in Free Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Dirt 4 cyl Modifieds | Results | | Andy Klosterman (B Modifieds) | 6th | - | - | 15th (DNF) |
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| 6/12/2021 | Shawano Speedway - Shawano, WI Tribute to the Go Karters Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Dirt 4 cyl Modifieds | Results | | Andy Klosterman (B Modifieds) | 1st | - | - | 8th |
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| 6/19/2021 | Shawano Speedway - Shawano, WI Hall of Fame Night - Ed Bertram/George Giesen Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Dirt 4 cyl Modifieds | Results | | Andy Klosterman (B Modifieds) | 1st | - | - | 12th |
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| 7/2/2021 | Outagamie Speedway - Seymour, WI SPEED & FIREWORKS on Independence Day Weekend at Outagamie Speedway Street Stocks, IMCA Northern SportMod, IMCA Stock Car, IMCA Sport Compact | Results | | Andy Klosterman (IMCA Northern SportMod) | 2nd | - | - | 24th (DNF) |
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| 7/10/2021 | 141 Speedway - Maribel, WI Christmas in July St Jude's Fundraiser / Triple Creek Stock Cars $1,000.00 to Win / 141 CC #11 Stock Cars, Sportsmans, Sport Compact, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car | Results | | Andy Klosterman (IMCA Northern SportMod) | 8th | - | 6th | 15th |
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| 7/23/2021 | Shawano Speedway - Shawano, WI Mid-Summer Classic Stock Cars, A Modifieds, B Modifieds, Street Stocks, Dirt Late Models | Results | | Andy Klosterman (B Modifieds) | 8th | - | - | 19th |
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| 7/31/2021 | Shawano Speedway - Shawano, WI Racing for a Reason Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Dirt 4 cyl Modifieds | Results | | Andy Klosterman (B Modifieds) | - | - | - | - |
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| 8/3/2021 | Deer Creek Speedway - Spring Valley, MN 2021 IMCA Harris Clash IMCA Modified, IMCA Northern SportMod | Results | | Andy Klosterman (IMCA Northern SportMod) | 8th | - | 7th | - |
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| 8/18/2021 | 141 Speedway - Maribel, WI Captain of the Creek III $10,000.00 to Win IMCA Northern SportMods - Qualifying Sport Compact, IMCA Modified, IMCA Northern SportMod | Results | | Andy Klosterman (IMCA Northern SportMod) | 5th | - | - | 32nd |
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| 8/19/2021 | 141 Speedway - Maribel, WI Captain of the Creek III $10,000.00 to Win IMCA Northern SportMods Stock Cars, IMCA Northern SportMod, IMCA Stock Car | Results | | Andy Klosterman (IMCA Northern SportMod) | 14th | - | - | - |
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| 9/4/2021 | Shawano Speedway - Shawano, WI Championship Night Stock Cars, A Modifieds, B Modifieds, Dirt Late Models, Dirt 4 cyl Modifieds | Results | | Andy Klosterman (B Modifieds) | 1st | - | - | 22nd (DNF) |
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| 9/10/2021 | Outagamie Speedway - Seymour, WI 410 Sprints - Winged: IRA Interstate Racing Association Baby Grand, IMCA Northern SportMod | Results | | Andy Klosterman (IMCA Northern SportMod) | 4th | - | - | 12th |
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| 9/18/2021 | Outagamie Speedway - Seymour, WI 2021 FALL BRAWL presented by KLINK EQUIPMENT Street Stocks, Dirt Late Models, Baby Grand, IMCA Modified, IMCA Northern SportMod, IMCA Stock Car, IMCA Sport Compact | Results | | Andy Klosterman (IMCA Northern SportMod) | 5th | - | 1st | 23rd (DNF) |
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