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| 3/6/2021 | Rocket Raceway Park - Petty, TX Season Opener Hobby Stocks, Stock Cars, 600cc Modifieds, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks, USRA Tuners | Results | | Shannon Hartline (USRA Factory Stocks) | 3rd | - | - | 4th |
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| 3/20/2021 | Rocket Raceway Park - Petty, TX 82 Speedway Hobby Stocks, Stock Cars, 600cc Modifieds, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks, USRA Tuners | Results | | Shannon Hartline (USRA Modifieds) | 2nd | - | - | 10th | | Shannon Hartline (USRA Factory Stocks) | 1st | - | - | 3rd |
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| 3/27/2021 | Rocket Raceway Park - Petty, TX 82 Speedway Hobby Stocks, Stock Cars, 600cc Modifieds, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks, USRA Tuners | Results | | Shannon Hartline (USRA Modifieds) | 4th | - | - | 6th | | Shannon Hartline (USRA Factory Stocks) | 3rd | - | - | 3rd |
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| 4/3/2021 | Rocket Raceway Park - Petty, TX 82 Speedway Winged Sprints: Bandits Outlaw Sprint Series Hobby Stocks, Stock Cars, 600cc Modifieds, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Shannon Hartline (USRA Modifieds) | 6th | - | - | 13th | | Shannon Hartline (USRA Factory Stocks) | 1st | - | - | 1st |
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| 4/10/2021 | Rocket Raceway Park - Petty, TX $5,000/win FACTORY STOCKS! TEXAS SPRINT SERIES! 305 Sprints - Winged: Texas Sprint Series Hobby Stocks, Stock Cars, 600cc Modifieds, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks, IMCA RaceSaver Sprint Car | Results | | Shannon Hartline (USRA Factory Stocks) | 10th | - | 8th | - |
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| 5/1/2021 | Southern Oklahoma Speedway - Ardmore, OK TOMS A Modifieds: TOMS - Touring Outlaw Modified Series Hobby Stocks, Stock Cars, 600cc Modifieds, Limited Sport Mod, IMCA Stock Car | Results | | Shannon Hartline (Hobby Stocks) | 1st | - | - | 1st |
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| 5/8/2021 | Rocket Raceway Park - Petty, TX 82 Speedway Hobby Stocks, Stock Cars, 600cc Modifieds, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Shannon Hartline (USRA Modifieds) | 2nd | - | - | 9th | | Shannon Hartline (USRA Factory Stocks) | 1st | - | - | 14th |
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| 5/15/2021 | Rocket Raceway Park - Petty, TX 82 Speedway Hobby Stocks, Stock Cars, 600cc Modifieds, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Shannon Hartline (USRA Modifieds) | 1st | - | - | 4th |
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| 5/27/2021 | Grayson County Speedway - Bells, TX All Star Shoot Out Factory Stocks, IMCA Modified, IMCA Southern SportMod, IMCA Stock Car | Rain Out |
| 5/29/2021 | Southern Oklahoma Speedway - Ardmore, OK Regular Night of Racing - Topless Mods Hobby Stocks, 600cc Modifieds, Limited Modified | Results | | Shannon Hartline (Hobby Stocks) | 4th | - | 3rd | 5th |
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| 6/19/2021 | Hunt County Raceway - Greenville, TX USRA American Racer Modified Series USRA Modifieds: USRA American Racer Modified Series Stock Cars, A Modifieds, USRA Limited Mods, USRA Factory Stocks, USRA Tuners | Results | | Shannon Hartline (USRA Modifieds) | 5th | - | 4th | 19th | | Shannon Hartline (USRA Factory Stocks) | 2nd | - | - | 6th |
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| 6/20/2021 | Rocket Raceway Park - Petty, TX 82 Speedway Hobby Stocks, Stock Cars, 600cc Modifieds, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Results | | Shannon Hartline (USRA Modifieds) | 2nd | - | - | 7th | | Shannon Hartline (USRA Factory Stocks) | 1st | - | - | 2nd |
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| 6/26/2021 | Rocket Raceway Park - Petty, TX 82 Speedway Hobby Stocks, Stock Cars, 600cc Modifieds, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks | Canceled |
| 7/3/2021 | Grayson County Speedway - Bells, TX Race Program / Firework Show Factory Stocks, Hobby Stocks, Street Stocks, 600cc Modifieds, IMCA Southern SportMod | Results | | Shannon Hartline (Factory Stocks) | 2nd | - | - | 2nd | | Shannon Hartline (Street Stocks) | 3rd | - | - | 2nd |
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| 7/10/2021 | Southern Oklahoma Speedway - Ardmore, OK TOMS A Modifieds: TOMS - Touring Outlaw Modified Series Hobby Stocks, Stock Cars, 600cc Modifieds, Limited Sport Mod | Results | | Shannon Hartline (Hobby Stocks) | 1st | - | - | 6th | | Shannon Hartline (A Modifieds) | 3rd | - | - | 8th |
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| 7/17/2021 | Grayson County Speedway - Bells, TX Race Program / TBA Factory Stocks, Hobby Stocks, 600cc Modifieds, Limited Modified, IMCA Southern SportMod | Results | | Shannon Hartline (Factory Stocks) | 3rd | - | - | 2nd |
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| 7/24/2021 | Hunt County Raceway - Greenville, TX IMCA Mod Lites, Stock Cars, A Modifieds, Restricted 'A' Class, Winged A-Class, Super Stocks, USRA Limited Mods, USRA Factory Stocks, USRA Tuners | Results | | Shannon Hartline (A Modifieds) | 2nd | - | - | 12th |
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| 7/31/2021 | Hunt County Raceway - Greenville, TX 7th Annual Hella Shrine Race A Modifieds: TOMS - Touring Outlaw Modified Series Winged A-Class: NOW600 A-Class Micros Stock Cars, Restricted 'A' Class, Super Stocks, USRA Limited Mods, USRA Factory Stocks, USRA Tuners | Results | | Shannon Hartline (A Modifieds) | 3rd | - | - | 12th | | Shannon Hartline (USRA Factory Stocks) | 2nd | - | - | 13th |
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| 8/7/2021 | Southern Oklahoma Speedway - Ardmore, OK TOMS A Modifieds: TOMS - Touring Outlaw Modified Series Factory Stocks, Hobby Stocks, Stock Cars, 600cc Modifieds, Limited Sport Mod | Results | | Shannon Hartline (A Modifieds) | 2nd | - | - | 7th |
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| 8/14/2021 | Abilene Speedway - Abilene, TX TOMS, TEXAS OUTLAW MOD SERIES ..1ST SEASON @ ABILENE SPEEDWAY A Modifieds: TOMS - Touring Outlaw Modified Series Stock Cars, Street Stocks, IMCA Southern SportMod, IMCA Stock Car, IMCA Sport Compact | Results | | Shannon Hartline (A Modifieds) | 5th | - | 8th | - |
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| 9/25/2021 | Grayson County Speedway - Bells, TX Race Program / Toms - Touring Outlaw Modified Series A Modifieds: TOMS - Touring Outlaw Modified Series Factory Stocks, Hobby Stocks, 600cc Modifieds, IMCA Southern SportMod | Results | | Shannon Hartline (Factory Stocks) | 1st | - | - | 3rd |
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| 10/2/2021 | Hunt County Raceway - Greenville, TX TOMS Modifieds A Modifieds: TOMS - Touring Outlaw Modified Series Stock Cars, Restricted 'A' Class, Winged A-Class, Super Stocks, USRA Limited Mods, USRA Factory Stocks, USRA Tuners | Results | | Shannon Hartline (USRA Factory Stocks) | 1st | - | - | 17th |
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| 10/9/2021 | Grayson County Speedway - Bells, TX Patsy Peters Memorial Race Factory Stocks, Hobby Stocks, Stock Cars, A Modifieds, 600cc Modifieds, Limited Sport Mod | Results | | Shannon Hartline (Factory Stocks) | 6th | - | 2nd | 21st (DNF) | | Shannon Hartline (Limited Sport Mod) | 2nd | - | - | 1st |
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| 10/15/2021 | Southern Oklahoma Speedway - Ardmore, OK TOMS Nationals - Night 1 A Modifieds: TOMS - Touring Outlaw Modified Series Hobby Stocks, Limited Sport Mod | Results | | Shannon Hartline (Limited Sport Mod) | 4th | - | - | - |
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| 10/16/2021 | Southern Oklahoma Speedway - Ardmore, OK TOMS Nationals - Night 2 A Modifieds: TOMS - Touring Outlaw Modified Series Hobby Stocks, Limited Sport Mod | Results | | Shannon Hartline (Limited Sport Mod) | - | - | - | 6th |
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