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| 5/7/2021 | Wagner Speedway - Wagner, SD Week 1 Dirt Late Models, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Trefer Waller (IMCA RaceSaver Sprint Car) | 2nd | - | - | 1st |
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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 | | Trefer Waller (305 Sprints - Winged) | 5th | - | - | 9th |
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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 | | Trefer Waller (IMCA RaceSaver Sprint Car) | 5th | - | - | 7th |
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| 5/21/2021 | Wagner Speedway - Wagner, SD Week 3 Dirt Late Models, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Trefer Waller (IMCA RaceSaver Sprint Car) | 5th | - | - | 2nd |
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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 | | Trefer Waller (305 Sprints - Winged) | 2nd | - | - | 2nd |
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| 5/23/2021 | Stuart Raceway - Stuart, NE 305 Sprints - Winged, Hobby Stocks, Stock Cars, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, B Modifieds | Results | | Trefer Waller (305 Sprints - Winged) | 3rd | - | - | 4th |
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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 | | Trefer Waller (IMCA RaceSaver Sprint Car) | 4th | - | - | 9th |
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| 6/4/2021 | Wagner Speedway - Wagner, SD MSTS Western Swing at Wagner Speedway 360 Sprints - Winged: Midwest Sprint Touring Series IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Trefer Waller (IMCA RaceSaver Sprint Car) | 4th | - | - | 7th (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 | | Trefer Waller (305 Sprints - Winged) | 3rd | - | - | 2nd |
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| 6/6/2021 | Stuart Raceway - Stuart, NE 305 Sprints - Winged, Hobby Stocks, Stock Cars, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, B Modifieds, Vintage Modifieds | Results | | Trefer Waller (305 Sprints - Winged) | 1st | - | - | 3rd |
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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 | | Trefer Waller (305 Sprints - Winged) | 4th | - | - | 4th |
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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 | | Trefer Waller (IMCA RaceSaver Sprint Car) | 5th | - | - | 13th |
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| 6/18/2021 | Wagner Speedway - Wagner, SD Week 7 Dirt Late Models, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Trefer Waller (IMCA RaceSaver Sprint Car) | 1st | - | - | 9th (DNF) |
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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 | | Trefer Waller (305 Sprints - Winged) | 1st | - | - | 5th |
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| 6/20/2021 | Stuart Raceway - Stuart, NE 305 Sprints - Winged, Hobby Stocks, Stock Cars, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, B Modifieds | Results | | Trefer Waller (305 Sprints - Winged) | 2nd | - | - | 2nd |
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| 6/25/2021 | Wagner Speedway - Wagner, SD MSTS at Wagner Speedway 360 Sprints - Winged, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Trefer Waller (IMCA RaceSaver Sprint Car) | 1st | - | - | 1st |
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| 6/27/2021 | Stuart Raceway - Stuart, NE 305 Sprints - Winged, Hobby Stocks, Stock Cars, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, B Modifieds | Results | | Trefer Waller (305 Sprints - Winged) | 3rd | - | - | 4th |
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| 7/2/2021 | Wagner Speedway - Wagner, SD Week 9 Dirt Late Models, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Trefer Waller (IMCA RaceSaver Sprint Car) | 1st | - | - | 1st |
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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 | | Trefer Waller (305 Sprints - Winged) | 2nd | - | - | 6th |
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| 7/4/2021 | Stuart Raceway - Stuart, NE 305 Sprints - Winged, Hobby Stocks, Stock Cars, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, B Modifieds | Results | | Trefer Waller (305 Sprints - Winged) | 2nd | - | - | 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 | | Trefer Waller (305 Sprints - Winged) | 1st | - | - | 7th |
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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 | | Trefer Waller (IMCA RaceSaver Sprint Car) | 2nd | - | - | 14th |
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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 | | Trefer Waller (305 Sprints - Winged) | 5th | - | - | 9th |
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| 7/18/2021 | Stuart Raceway - Stuart, NE 305 Sprints - Winged, Hobby Stocks, Stock Cars, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, B Modifieds | Results | | Trefer Waller (305 Sprints - Winged) | 2nd | - | - | 3rd |
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| 7/23/2021 | Wagner Speedway - Wagner, SD Week 11 Dirt Late Models, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Trefer Waller (IMCA RaceSaver Sprint Car) | 2nd | - | - | 2nd |
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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 | | Trefer Waller (305 Sprints - Winged) | 5th | - | - | 5th |
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| 7/25/2021 | Stuart Raceway - Stuart, NE 305 Sprints - Winged, Hobby Stocks, Stock Cars, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, B Modifieds, Vintage Modifieds | Results | | Trefer Waller (305 Sprints - Winged) | 3rd | - | - | 5th |
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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 | | Trefer Waller (305 Sprints - Winged) | 1st | - | - | 14th (DNF) |
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| 8/1/2021 | Stuart Raceway - Stuart, NE 305 Sprints - Winged, Hobby Stocks, Stock Cars, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, B Modifieds | Results | | Trefer Waller (305 Sprints - Winged) | 3rd | - | - | 4th |
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| 8/7/2021 | I-90 Speedway - Hartford, SD Paramount Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Trefer Waller (305 Sprints - Winged) | 5th | - | - | 4th |
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| 8/8/2021 | Stuart Raceway - Stuart, NE 305 Sprints - Winged, Hobby Stocks, Stock Cars, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, B Modifieds | Results | | Trefer Waller (305 Sprints - Winged) | 2nd | - | - | 3rd |
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| 8/13/2021 | Wagner Speedway - Wagner, SD Week 14 IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Trefer Waller (IMCA RaceSaver Sprint Car) | 3rd | - | - | 7th (DNF) |
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| 8/14/2021 | I-90 Speedway - Hartford, SD Hartford Vet Clinic presents: Pitstop Challenge & Paramount Racing Series 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Trefer Waller (305 Sprints - Winged) | 3rd | - | - | 7th |
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| 8/15/2021 | Stuart Raceway - Stuart, NE 305 Sprints - Winged, Hobby Stocks, Stock Cars, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, B Modifieds | Results | | Trefer Waller (305 Sprints - Winged) | 2nd | - | - | 5th |
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| 8/20/2021 | Wagner Speedway - Wagner, SD Week 15 Dirt Late Models, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Trefer Waller (IMCA RaceSaver Sprint Car) | DNS | - | - | 2nd |
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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 | | Trefer Waller (305 Sprints - Winged) | 6th (DNF) | - | 2nd | 12th |
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| 8/27/2021 | Wagner Speedway - Wagner, SD Championship Dirt Late Models, IMCA Northern SportMod, IMCA Stock Car, IMCA Hobby Stock, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Trefer Waller (IMCA RaceSaver Sprint Car) | 2nd | - | - | 8th |
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| 9/11/2021 | I-90 Speedway - Hartford, SD Paramount Racing Series Championship 305 Sprints - Winged, Street Stocks, USRA B-Mods, USRA Hobby Stocks | Results | | Trefer Waller (305 Sprints - Winged) | 7th | - | 1st | 19th (DNF) |
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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 | | Trefer Waller (IMCA RaceSaver Sprint Car) | 1st | - | - | 11th |
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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 | | Trefer Waller (IMCA RaceSaver Sprint Car) | 6th | - | 1st | 18th (DNF) |
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