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| 3/23/2018 | Hunt County Raceway - Greenville, TX Restricted 'A' Class: NOW600 National Micros with NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros Stock Non-Wing: NOW600 Non-Wing Micros | Results | | Colby Stubblefield (Winged A-Class) | 7th | - | - | 4th | | Colby Stubblefield (Stock Non-Wing) | 2nd | - | - | 4th |
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| 3/24/2018 | Hunt County Raceway - Greenville, TX Restricted 'A' Class: NOW600 National Micros with NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros Stock Non-Wing: NOW600 Non-Wing Micros | Results | | Colby Stubblefield (Winged A-Class) | - | - | - | 9th | | Colby Stubblefield (Stock Non-Wing) | - | - | - | 3rd |
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| 4/20/2018 | RPM Speedway - Crandall, TX Winged A-Class: NOW600 A-Class Micros Sportsmans | Results | | Colby Stubblefield (Winged A-Class) | 2nd | - | - | 1st |
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| 5/11/2018 | RPM Speedway - Crandall, TX Winged A-Class: NOW600 A-Class Micros 305 Sprints - Winged | Results | | Colby Stubblefield (Winged A-Class) | 2nd | - | - | 2nd |
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| 5/12/2018 | Hunt County Raceway - Greenville, TX Restricted 'A' Class: NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros | Results | | Colby Stubblefield (Winged A-Class) | 3rd | - | - | 5th |
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| 5/18/2018 | RPM Speedway - Crandall, TX Winged A-Class: NOW600 A-Class Micros | Results | | Colby Stubblefield (Winged A-Class) | 1st | - | - | 2nd |
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| 5/19/2018 | Hunt County Raceway - Greenville, TX $500 to win Stock Non-Wing Restricted 'A' Class: NOW600 Restricted Micros Stock Non-Wing: NOW600 Non-Wing Micros | Results | | Colby Stubblefield (Stock Non-Wing) | - | - | - | 8th |
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| 5/25/2018 | RPM Speedway - Crandall, TX 360 Sprints - Winged: ASCS Gulf South Region Winged A-Class: NOW600 A-Class Micros | Results | | Colby Stubblefield (Winged A-Class) | 2nd | - | - | 1st |
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| 6/1/2018 | RPM Speedway - Crandall, TX Winged A-Class: NOW600 A-Class Micros | Results | | Colby Stubblefield (Winged A-Class) | 3rd | - | - | 7th |
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| 6/2/2018 | Hunt County Raceway - Greenville, TX Restricted 'A' Class: NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros | Results | | Colby Stubblefield (Winged A-Class) | - | - | - | 5th |
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| 6/8/2018 | RPM Speedway - Crandall, TX Winged A-Class: NOW600 A-Class Micros | Results | | Colby Stubblefield (Winged A-Class) | 4th | - | - | 2nd |
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| 6/9/2018 | Hunt County Raceway - Greenville, TX Restricted 'A' Class: NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros | Results | | Colby Stubblefield (Winged A-Class) | - | - | - | 4th |
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| 6/15/2018 | RPM Speedway - Crandall, TX Stock Non-Wing: NOW600 Non-Wing Micros | Results | | Colby Stubblefield (Stock Non-Wing) | 1st | - | - | 2nd |
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| 6/16/2018 | Hunt County Raceway - Greenville, TX Restricted 'A' Class: NOW600 Restricted Micros Stock Non-Wing: NOW600 Non-Wing Micros | Results | | Colby Stubblefield (Stock Non-Wing) | 1st | - | - | 3rd |
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| 6/22/2018 | RPM Speedway - Crandall, TX Winged A-Class: NOW600 A-Class Micros | Results | | Colby Stubblefield (Winged A-Class) | 3rd | - | - | 2nd |
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| 6/23/2018 | Hunt County Raceway - Greenville, TX Winged A-Class: NOW600 A-Class Micros Stock Non-Wing: NOW600 Non-Wing Micros | Results | | Colby Stubblefield (Winged A-Class) | - | - | - | 4th | | Colby Stubblefield (Stock Non-Wing) | - | - | - | 7th |
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| 6/29/2018 | RPM Speedway - Crandall, TX Midgets: POWRi West Midgets Winged A-Class: NOW600 A-Class Micros | Results | | Colby Stubblefield (Midgets) | 8th | - | - | DNS | | Colby Stubblefield (Winged A-Class) | 3rd | - | - | 3rd |
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| 7/6/2018 | RPM Speedway - Crandall, TX Winged A-Class: NOW600 A-Class Micros | Results | | Colby Stubblefield (Winged A-Class) | 2nd | - | - | 1st |
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| 7/7/2018 | Hunt County Raceway - Greenville, TX Restricted 'A' Class: NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros | Results | | Colby Stubblefield (Winged A-Class) | - | - | - | 1st |
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| 7/14/2018 | Hunt County Raceway - Greenville, TX Winged A-Class: NOW600 A-Class Micros | Results | | Colby Stubblefield (Winged A-Class) | - | - | - | 3rd |
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| 7/20/2018 | RPM Speedway - Crandall, TX Restricted 'A' Class: NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros | Results | | Colby Stubblefield (Winged A-Class) | 2nd | - | - | 4th |
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| 7/21/2018 | Hunt County Raceway - Greenville, TX Restricted 'A' Class: NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros Stock Non-Wing: NOW600 Non-Wing Micros | Results | | Colby Stubblefield (Stock Non-Wing) | 1st | - | - | 1st |
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| 7/27/2018 | RPM Speedway - Crandall, TX Winged A-Class: NOW600 A-Class Micros | Results | | Colby Stubblefield (Winged A-Class) | - | - | - | 4th |
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| 8/17/2018 | RPM Speedway - Crandall, TX Winged A-Class: NOW600 A-Class Micros | Results | | Colby Stubblefield (Winged A-Class) | 3rd | - | - | 1st |
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| 8/31/2018 | Heart O' Texas Speedway - Waco, TX Championship Night - Race of Champions - Mechanics Race - Lone Star 600 Minisprints Restricted 'A' Class: POWRi Lonestar 600 Restrictor's Stock Non-Wing: POWRi Lonestar 600's Non Wing Factory Stocks, Asphalt Mini Stocks, Stock Cars, A Modifieds, B Modifieds, Street Stocks | Results | | Colby Stubblefield (Stock Non-Wing) | 4th | - | - | - |
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