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| 5/29/2021 | Rice Lake Speedway - Rice Lake, WI Swant Graber presents Structural Buildings WISSOTA Challenge Series (No Mods) plus PS, St S, SS, MWM WISSOTA Late Model: Wissota Late Model Challenge Series WISSOTA Midwest Mods, WISSOTA Pure Stock, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Mike Prochnow (WISSOTA Late Model) | 7th | - | - | 15th |
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| 6/11/2021 | Red Cedar Speedway - Menomonie, WI Race of Champions Raindate - Regular Night Hornets, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Mike Prochnow (WISSOTA Late Model) | 4th | - | - | 10th |
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| 7/2/2021 | Red Cedar Speedway - Menomonie, WI Bob Zebro 4th of July Shootout Hornets, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Mike Prochnow (WISSOTA Late Model) | 4th | - | - | 6th |
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| 7/9/2021 | Red Cedar Speedway - Menomonie, WI Military Night: All Military Personnel Get in FREE with Military I.D. Hornets, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Mike Prochnow (WISSOTA Late Model) | 2nd | - | - | 10th |
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| 7/16/2021 | Red Cedar Speedway - Menomonie, WI Dunn County Humane Society Night Hornets, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Mike Prochnow (WISSOTA Late Model) | 1st | - | - | 3rd |
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| 7/20/2021 | Gondik Law Speedway - Superior, WI Fair Week-Night #1 WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Pure Stock, WISSOTA Super Stock, WISSOTA Hornet | Results | | Mike Prochnow (WISSOTA Late Model) | 5th | - | - | 12th |
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| 7/22/2021 | Red Cedar Speedway - Menomonie, WI Dunn County Fair Night #1 & Street Drags Dirt Super Late Models, Hornets, WISSOTA Late Model | Results | | Mike Prochnow (WISSOTA Late Model) | 4th | - | - | 5th |
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| 7/30/2021 | Gondik Law Speedway - Superior, WI Structural Buildings WISSOTA Late Model Challenge Series WISSOTA Late Model: Wissota Late Model Challenge Series WISSOTA Super Stock: Fast Lane Motorsports Northland Super Stock Series WISSOTA Hornet | Results | | Mike Prochnow (WISSOTA Late Model) | 3rd | - | - | 12th |
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| 7/31/2021 | Rice Lake Speedway - Rice Lake, WI Structural Buildings WISSOTA Late Model Challenge Series WISSOTA Late Model: Wissota Late Model Challenge Series WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Pure Stock | Results | | Mike Prochnow (WISSOTA Late Model) | 1st | - | - | 8th |
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| 8/13/2021 | Red Cedar Speedway - Menomonie, WI Structural Buildings WISSOTA Late Model Challenge Series WISSOTA Late Model: Wissota Late Model Challenge Series WISSOTA Modifieds, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Mike Prochnow (WISSOTA Late Model) | 9th | - | 5th | 18th |
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| 8/20/2021 | Red Cedar Speedway - Menomonie, WI Final Track Points Night (Mahder 55 Rain Date) Hornets, WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Mike Prochnow (WISSOTA Late Model) | 5th | - | - | 6th |
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| 9/10/2021 | Gondik Law Speedway - Superior, WI Northern Nationals-Night #2 WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Super Stock | Results | | Mike Prochnow (WISSOTA Late Model) | 5th | - | 3rd | 9th |
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| 9/11/2021 | Gondik Law Speedway - Superior, WI Northern Nationals-Night #3 WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Super Stock | Results | | Mike Prochnow (WISSOTA Late Model) | 3rd | - | - | 9th |
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| 9/17/2021 | I-94 Speedway - Fergus Falls, MN WISSOTA 100 WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Mike Prochnow (WISSOTA Late Model) | 3rd | - | - | 8th |
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| 9/18/2021 | I-94 Speedway - Fergus Falls, MN WISSOTA 100 A Modifieds, WISSOTA Midwest Mods, WISSOTA Mod Four, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Mike Prochnow (WISSOTA Late Model) | - | - | - | 12th |
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| 9/24/2021 | Red Cedar Speedway - Menomonie, WI 41st Annual Punky Manor Challenge of Champions Night #1 Heats WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Mike Prochnow (WISSOTA Late Model) | 4th | - | - | - |
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| 9/25/2021 | Red Cedar Speedway - Menomonie, WI 41st Annual Punky Manor Challenge Of Champions Features & Hall of Fame Induction WISSOTA Midwest Mods, WISSOTA Modifieds, WISSOTA Late Model, WISSOTA Street Stock, WISSOTA Super Stock | Results | | Mike Prochnow (WISSOTA Late Model) | 4th | - | - | 17th |
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