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| 4/30/2021 | Rapid Speedway - Rock Rapids, IA Weekly Racing Series + 305 Sprints DIRTcar Sportsmans, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 6th | - | - | 10th |
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| 5/7/2021 | Crawford County Speedway - Denison, IA Regular Night All Classes-$1000 to win Modified 305 Sprints - Winged, Hobby Stocks, Stock Cars, A Modifieds, B Modifieds, Hornets, Sport Compact | Results | | John Lambertz (305 Sprints - Winged) | 3rd | - | - | 4th |
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| 5/9/2021 | Huset's Speedway - Brandon, SD Mothers Day Opener- Rosenbauer America Night 410 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 2nd | - | - | DNS |
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| 5/15/2021 | I-90 Speedway - Hartford, SD Northern Outlaw Sprint Association + Paramount Racing 410 Sprints - Winged: Northern Outlaw Sprint Association 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 6th | - | - | 6th |
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| 5/16/2021 | Huset's Speedway - Brandon, SD NOSA Sprint Cars- 410 Sprints - Winged: Northern Outlaw Sprint Association Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 1st | - | - | 1st |
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| 5/22/2021 | I-90 Speedway - Hartford, SD Paramount Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 4th | - | - | 6th |
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| 5/23/2021 | Huset's Speedway - Brandon, SD Growmark FS - Night 410 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 2nd | - | - | 2nd |
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| 5/30/2021 | Huset's Speedway - Brandon, SD NOSA Sprint Cars- Frankman Motors Night 410 Sprints - Winged: Northern Outlaw Sprint Association Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 7th | - | 12th (DNF) | - |
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| 6/5/2021 | I-90 Speedway - Hartford, SD CCL Labels Night: Paramount Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 1st | - | - | 5th |
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| 6/6/2021 | Huset's Speedway - Brandon, SD I-29 RV SuperCenter - Night 410 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 1st | - | - | 16th (DNF) |
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| 6/12/2021 | I-90 Speedway - Hartford, SD MSTS at I-90 Speedway with Power Series 360 Sprints - Winged: Midwest Sprint Touring Series with Midwest Power Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 3rd | - | - | 5th |
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| 6/13/2021 | Huset's Speedway - Brandon, SD NOSA Sprint Cars - Seal Pros Night 410 Sprints - Winged: Northern Outlaw Sprint Association Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 1st | - | - | 3rd |
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| 6/19/2021 | I-90 Speedway - Hartford, SD Precision Drywall presents: Hartford Night w/ Paramount Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 3rd | - | - | 1st |
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| 6/20/2021 | Huset's Speedway - Brandon, SD Royal River Casino Night - $6,000 to Win 410 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 1st | - | - | 3rd |
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| 7/3/2021 | I-90 Speedway - Hartford, SD MSTS at I-90 Speedway 360 Sprints - Winged: Midwest Sprint Touring Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 3rd | - | - | 19th (DNF) |
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| 7/9/2021 | Rapid Speedway - Rock Rapids, IA Weekly Racing Series + 305 Sprints DIRTcar Sportsmans, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 3rd | - | - | 3rd |
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| 7/10/2021 | I-90 Speedway - Hartford, SD Paramount Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 6th | - | - | 9th |
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| 7/11/2021 | Huset's Speedway - Brandon, SD NOSA Sprint Cars - Big Frig Night 410 Sprints - Winged: Northern Outlaw Sprint Association Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 1st | - | - | 8th |
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| 7/17/2021 | I-90 Speedway - Hartford, SD MSTS at I-90 Speedway 360 Sprints - Winged: Midwest Sprint Touring Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 2nd | - | - | 4th |
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| 7/18/2021 | Huset's Speedway - Brandon, SD Hall of Fame Night - Presented by Spartan ER 410 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 6th (DNF) | - | - | 14th |
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| 7/24/2021 | I-90 Speedway - Hartford, SD Dirt Late Models: Tri-State Late Models 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 3rd | - | - | 1st |
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| 7/25/2021 | Huset's Speedway - Brandon, SD Nordstrom's Automotive Night 410 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 4th | - | - | 16th (DNF) |
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| 7/31/2021 | I-90 Speedway - Hartford, SD Chuck Zitterich Memorial at I-90 Speedway with Power Series 360 Sprints - Winged: Midwest Sprint Touring Series with Midwest Power Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 3rd | - | - | 16th (DNF) |
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| 8/1/2021 | Huset's Speedway - Brandon, SD Bull Haulers Brawl - Presented by Folkens Brothers Trucking - Gates Open 4:30 PM - Racing 8:00 PM 410 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 3rd | - | - | 6th |
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| 8/21/2021 | I-90 Speedway - Hartford, SD LMSS Legends & Paramount Racing Series 305 Sprints - Winged, Street Stocks, Masters Legends, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | DNS | - | DNS | - |
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| 8/29/2021 | Huset's Speedway - Brandon, SD NOSA Sprint Cars- Ace Ready Mix/ Myrl & Roy's Paving Night 410 Sprints - Winged: Northern Outlaw Sprint Association Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 1st | - | - | 1st |
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| 9/17/2021 | Rapid Speedway - Rock Rapids, IA Rapid Speedway Nationals USRA Hobby Stocks, USRA Stock Cars, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 3rd | - | - | 5th |
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| 9/25/2021 | Huset's Speedway - Brandon, SD CHAMPIONSHIP WEEKEND -NOSA 410 Outlaw Sprint Cars 410 Sprints - Winged: Northern Outlaw Sprint Association 360 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 3rd | - | - | 17th (DNF) |
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| 9/26/2021 | Huset's Speedway - Brandon, SD CHAMPIONSHIP WEEKEND - NOSA 410 Outlaw Sprint Cars 410 Sprints - Winged: Northern Outlaw Sprint Association 360 Sprints - Winged, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 5th | - | - | 23rd (DNF) |
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