| | Heat | Dash | B Feature | A Feature |
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| 5/3/2025 | I-90 Speedway - Hartford, SD SEASON OPENER 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 5th | - | 2nd | 17th (DNF) |
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| 5/9/2025 | Rapid Speedway - Rock Rapids, IA 305 Sprints + Regular Classes DIRTcar Sportsmans, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | DNS | - | - | 11th |
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| 5/10/2025 | I-90 Speedway - Hartford, SD RPM Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 4th | - | - | 16th |
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| 5/11/2025 | Huset's Speedway - Brandon, SD Mother's Day Opener presented by Northland Buildings, Inc 410 Sprints - Winged, 305 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 3rd | - | - | 1st |
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| 5/18/2025 | Huset's Speedway - Brandon, SD ShopHusets.com - MSTS 410 Sprint Cars 410 Sprints - Winged: Midwest Sprint Touring Series 305 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 5th | - | 3rd | 17th |
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| 5/25/2025 | Huset's Speedway - Brandon, SD BillionAuto.com Memorial Weekend Doubleheader 410 Sprints - Winged, 305 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 8th (DNF) | - | DNS | - |
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| 5/30/2025 | Rapid Speedway - Rock Rapids, IA Ladies Night! DIRTcar Sportsmans, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 1st | - | - | 9th |
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| 5/31/2025 | I-90 Speedway - Hartford, SD RPM Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 2nd | - | - | 4th |
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| 6/1/2025 | Huset's Speedway - Brandon, SD Frankman Motor Company Night 410 Sprints - Winged: Midwest Sprint Touring Series 305 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 5th | - | 1st | 16th (DNF) |
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| 6/7/2025 | I-90 Speedway - Hartford, SD RaceSaver Sprint Special & RPM Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 5th | - | 1st | 17th (DNF) |
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| 6/8/2025 | Huset's Speedway - Brandon, SD Metro Construction Night 410 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 3rd | - | - | 12th |
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| 6/12/2025 | Kossuth County Speedway - Algona, IA IMCA Racesaver Sprints 360 Sprints - Winged, 305 Sprints - Winged, Hobby Stocks, A Modifieds, B Modifieds, Street Stocks, Dirt Limited Late Models | Results | | John Lambertz (305 Sprints - Winged) | DNS | - | - | 17th (DNF) |
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| 6/13/2025 | Rapid Speedway - Rock Rapids, IA 305 Sprints + Regular Classes DIRTcar Sportsmans, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 2nd | - | - | 9th |
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| 6/14/2025 | I-90 Speedway - Hartford, SD KIDS NIGHT! RPM Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 5th | - | 1st | 17th (DNF) |
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| 6/27/2025 | Rapid Speedway - Rock Rapids, IA Great Bike Giveaway DIRTcar Sportsmans, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | DNS | - | - | 14th |
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| 6/28/2025 | I-90 Speedway - Hartford, SD FIREWORKS Show & RPM Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 4th | - | - | 8th |
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| 7/5/2025 | I-90 Speedway - Hartford, SD Driver Meet & Greet! RPM Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 1st | - | - | 14th |
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| 7/11/2025 | Jackson Motorplex - Jackson, MN Hefty Seed Merle Johnson Memorial presented by DKW Transport 410 Sprints - Winged: Midwest Sprint Touring Series IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 8th (DNF) | - | 14th | - |
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| 7/12/2025 | I-90 Speedway - Hartford, SD RaceSaver Sprint Special & RPM Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 6th | - | 2nd | 8th |
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| 7/13/2025 | Huset's Speedway - Brandon, SD Hall of Fame Night -- Border Battle presented by T & K Transport 410 Sprints - Winged, 305 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 1st | - | - | 7th |
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| 7/18/2025 | Rapid Speedway - Rock Rapids, IA Christmas in July! DIRTcar Sportsmans, USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 5th | - | - | 9th |
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| 7/22/2025 | Rapid Speedway - Rock Rapids, IA Lyon County Fair Races Presented by Folkens Brothers Trucking 410 Sprints - Winged: Midwest Sprint Touring Series DIRTcar Late Models, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 1st | - | - | 3rd |
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| 7/25/2025 | Jackson Motorplex - Jackson, MN C & B Border Battle #2 by New Fashion Pork & SW Broadband - MSTS 410 Sprint Cars & Racesavers 410 Sprints - Winged: Midwest Sprint Touring Series IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 2nd | - | - | 18th (DNF) |
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| 7/26/2025 | I-90 Speedway - Hartford, SD RPM Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | John Lambertz (305 Sprints - Winged) | 5th | - | 2nd | 10th |
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| 7/27/2025 | Huset's Speedway - Brandon, SD Nordstrom's Automotive -Border Battle #2 with Jackson & Knoxville Raceway 410 Sprints - Winged, 305 Sprints - Winged, Street Stocks, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 7th (DNF) | - | - | 10th |
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| 7/29/2025 | Jackson Motorplex - Jackson, MN Jeff Heser & Denny Froderman Memorial USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | - | - | - | - |
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| 8/4/2025 | Southern Iowa Speedway - Oskaloosa, IA 410 Sprints - Winged: IRA Interstate Racing Association IMCA RaceSaver Sprint Car | Results | | John Lambertz (IMCA RaceSaver Sprint Car) | 1st | - | - | 5th |
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