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| 2/27/2021 | I-37 Speedway - Pleasanton, TX Opening Night Warm Up Race (Non Points) Factory Stocks, Asphalt Mini Stocks, Street Stocks, Limited Modified, IMCA Modified, IMCA Stock Car | Results | | Marcus Mikulencak (Limited Modified) | 1st | - | - | 18th |
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| 3/13/2021 | I-37 Speedway - Pleasanton, TX I-37 Speedway Race Night Factory Stocks, Asphalt Mini Stocks, Street Stocks, Dwarf, Dirt Pro Trucks, Limited Modified, IMCA Modified | Results | | Marcus Mikulencak (Limited Modified) | 1st | - | - | 1st |
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| 3/20/2021 | I-37 Speedway - Pleasanton, TX I-37 Speedway Race Night Factory Stocks, Asphalt Mini Stocks, Street Stocks, Economy Late Models, Limited Modified, IMCA Modified | Results | | Marcus Mikulencak (Limited Modified) | 1st | - | - | 1st |
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| 4/10/2021 | Texana Raceway Park - Edna, TX Jude Allgayer Racing Night at the Races 305 Sprints - Winged, Factory Stocks, A Modifieds, B Modifieds, Street Stocks, Dirt Cage Kart Junior 1, Limited Sport Mod, IMCA Mod Lite, Cage Jr. Predator, Cage Sr. Predator | Results | | Marcus Mikulencak (Limited Sport Mod) | 4th | - | - | 10th |
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| 4/23/2021 | I-37 Speedway - Pleasanton, TX King Of The Hill Night Limited Mods Factory Stocks, Asphalt Mini Stocks, Street Stocks, Limited Modified, IMCA Modified | Rain Out |
| 4/24/2021 | I-37 Speedway - Pleasanton, TX I-37 Speedway Race Night Factory Stocks, Asphalt Mini Stocks, Restricted 'A' Class, Stock Non-Wing, Street Stocks, Economy Late Models, Limited Modified, IMCA Modified | Results | | Marcus Mikulencak (Limited Modified) | 1st | - | - | 18th |
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| 5/30/2021 | Texana Raceway Park - Edna, TX Tony's Mobil Home Service Salute to the Troops Featuring the STLMS Late Models Dirt Late Models: XR Southern Storm Factory Stocks, A Modifieds, B Modifieds, Street Stocks, Dirt Cage Kart Junior 1, Flat Adult Clone, Dirt Pro Trucks, Limited Sport Mod, IMCA Mod Lite, Cage Jr. Predator, Cage Sr. Predator | Results | | Marcus Mikulencak (A Modifieds) | 7th | - | - | 6th |
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| 5/31/2021 | Texana Raceway Park - Edna, TX Operation Honor the Fallen Factory Stocks, A Modifieds, B Modifieds, Street Stocks, Dirt Late Models, Dirt Cage Kart Junior 1, Flat Adult Clone, Limited Sport Mod, IMCA Mod Lite, Cage Jr. Predator, Cage Sr. Predator | Results | | Marcus Mikulencak (A Modifieds) | 3rd | - | - | DNS |
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| 6/19/2021 | Texana Raceway Park - Edna, TX Revved Up Sports Show Night at the Races Factory Stocks, A Modifieds, B Modifieds, Street Stocks, Dirt Cage Kart Junior 1, Flat Adult Clone, Limited Sport Mod, Pro Dwarf, IMCA Mod Lite, Cage Jr. Predator, Cage Sr. Predator | Results | | Marcus Mikulencak (A Modifieds) | 2nd | - | - | 5th |
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| 6/25/2021 | I-37 Speedway - Pleasanton, TX Late Models $1000 to Win Factory Stocks, Asphalt Mini Stocks, Street Stocks, Economy Late Models, Limited Modified, IMCA Modified | Results | | Marcus Mikulencak (IMCA Modified) | 2nd | - | - | 2nd |
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| 6/26/2021 | I-37 Speedway - Pleasanton, TX I-37 Speedway Fireworks Night Factory Stocks, Asphalt Mini Stocks, Restricted 'A' Class, Stock Non-Wing, Street Stocks, Limited Modified, IMCA Modified | Results | | Marcus Mikulencak (IMCA Modified) | 1st | - | - | 10th |
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| 7/24/2021 | Texana Raceway Park - Edna, TX CCT Field Services Night at the Races Factory Stocks, A Modifieds, Restricted 'A' Class, Stock Non-Wing, B Modifieds, Street Stocks, Dirt Cage Kart Junior 1, Flat Adult Clone, Limited Sport Mod, Pro Dwarf, IMCA Mod Lite, Cage Jr. Predator, Cage Sr. Predator | Results | | Marcus Mikulencak (A Modifieds) | 1st | - | - | 2nd |
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| 7/31/2021 | I-37 Speedway - Pleasanton, TX Factory Stock $1500 To Win Factory Stocks, Asphalt Mini Stocks, Street Stocks, Asphalt 4-Cylinders, Limited Modified, IMCA Modified | Results | | Marcus Mikulencak (IMCA Modified) | 3rd | - | - | 7th |
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| 8/20/2021 | South Texas Race Ranch - Corpus Christi, TX South Texas Speedway Racing Factory Stocks, Stock Cars, Sportsmans, B Modifieds | Results | | Marcus Mikulencak (B Modifieds) | 3rd | - | - | 5th |
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| 8/21/2021 | South Texas Race Ranch - Corpus Christi, TX Tecate Championship Chase Race 1 Factory Stocks, Stock Cars, Sportsmans, B Modifieds, Dirt Late Models, Dwarf | Results | | Marcus Mikulencak (B Modifieds) | 3rd | - | - | 3rd |
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| 9/11/2021 | I-37 Speedway - Pleasanton, TX I-37 Speedway Race Night Factory Stocks, Asphalt Mini Stocks, Street Stocks, Dwarf, Limited Modified, IMCA Modified | Results | | Marcus Mikulencak (Limited Modified) | 1st | - | - | 1st |
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| 9/18/2021 | I-37 Speedway - Pleasanton, TX I-37 Speedway Race Night Factory Stocks, Asphalt Mini Stocks, Street Stocks, Economy Late Models, Limited Modified, IMCA Modified | Results | | Marcus Mikulencak (Limited Modified) | 1st | - | - | 1st |
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| 10/15/2021 | Abilene Speedway - Abilene, TX SMILEY'S RACING PRODUCTS * SOUTHERN CHALLENGE Stock Cars, Street Stocks, IMCA Modified, IMCA Southern SportMod, IMCA Stock Car, IMCA Sport Compact | Results | | Marcus Mikulencak (IMCA Southern SportMod) | 1st | - | - | 4th |
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| 10/16/2021 | Abilene Speedway - Abilene, TX SMILEY'S RACING PRODUCTS * SOUTHERN CHALLENGE 305 Sprints - Winged, Stock Cars, Street Stocks, IMCA Modified, IMCA Southern SportMod, IMCA Stock Car, IMCA RaceSaver Sprint Car, IMCA Sport Compact | Results | | Marcus Mikulencak (IMCA Southern SportMod) | - | - | - | 7th |
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| 12/9/2021 | South Texas Race Ranch - Corpus Christi, TX Jerry Whiteaker Memorial 3 Practice Factory Stocks, Asphalt Mini Stocks, Stock Cars, Sportsmans, A Modifieds, B Modifieds, Street Stocks, Dirt Late Models, 250cc Open | Results | | Marcus Mikulencak (Street Stocks) | - | - | - | - |
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| 12/10/2021 | South Texas Race Ranch - Corpus Christi, TX Jerry Whiteaker Memorial 3 Qualifying Night Factory Stocks, Stock Cars, Sportsmans, B Modifieds | Results | | Marcus Mikulencak (B Modifieds) | 1st | - | - | - |
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| 12/11/2021 | South Texas Race Ranch - Corpus Christi, TX Jerry Whiteaker Memorial 3 Championship Night Factory Stocks, Stock Cars, Sportsmans, A Modifieds, B Modifieds, Dirt Late Models | Results | | Marcus Mikulencak (B Modifieds) | - | - | - | 17th |
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