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| 3/8/2018 | Port City Raceway - Tulsa, OK The Clash - Night 1 Restricted 'A' Class: NOW600 National Micros with NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros Stock Non-Wing: NOW600 Non-Wing Micros Junior Sprints | Results | | Shawn Mahaffey (Restricted 'A' Class) | 1st | - | - | 5th |
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| 3/9/2018 | Port City Raceway - Tulsa, OK The Clash - Night 2 Restricted 'A' Class: NOW600 National Micros with NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros Stock Non-Wing: NOW600 Non-Wing Micros Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 3rd | - | - | 1st |
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| 3/10/2018 | Port City Raceway - Tulsa, OK pratice Restricted 'A' Class: NOW600 National Micros with NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros Stock Non-Wing: NOW600 Non-Wing Micros Winged Outlaw, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | - | - | - | 3rd |
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| 3/30/2018 | Port City Raceway - Tulsa, OK spring fling Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 3rd | - | - | 7th |
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| 3/31/2018 | Port City Raceway - Tulsa, OK spring fling Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 3rd | - | - | 14th |
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| 4/13/2018 | Creek County Speedway - Sapulpa, OK "Micro Sprints" regular points Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 7th | - | - | 3rd |
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| 4/14/2018 | Port City Raceway - Tulsa, OK Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 2nd | - | - | 3rd |
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| 4/28/2018 | Port City Raceway - Tulsa, OK Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 1st | - | - | 4th |
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| 5/5/2018 | Port City Raceway - Tulsa, OK Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 2nd | - | - | 4th |
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| 5/6/2018 | Creek County Speedway - Sapulpa, OK A Modifieds: USMTS - United States Modified Touring Series Restricted 'A' Class: NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 2nd | - | - | 4th |
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| 5/12/2018 | Port City Raceway - Tulsa, OK Midgets: POWRi West Midgets Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 1st | - | - | 4th |
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| 5/19/2018 | Port City Raceway - Tulsa, OK Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 4th | - | - | 8th |
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| 5/26/2018 | Southern Illinois Raceway - Marion, IL Weekly Points/Restrictor Special Winged Outlaw, Non-Wing Outlaw, Restricted 'A' Class, Junior Sprints, Dwarf, 600cc Modifieds, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 3rd | - | - | 2nd |
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| 6/2/2018 | Port City Raceway - Tulsa, OK Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 2nd | - | - | 1st |
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| 6/15/2018 | Arkoma Speedway - Arkoma, OK 6/9/18 make up race Restricted 'A' Class: NOW600 Restricted Micros Winged Outlaw, Winged A-Class, Stock Non-Wing, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 4th | - | - | 2nd |
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| 6/16/2018 | Port City Raceway - Tulsa, OK Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 3rd | - | - | 18th |
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| 6/20/2018 | Caney Valley Speedway - Caney, KS Sooner 600 Week - Night 1 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 | | Shawn Mahaffey (Restricted 'A' Class) | 2nd | - | - | 1st |
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| 6/21/2018 | Creek County Speedway - Sapulpa, OK Sooner 600 Week - Night 2 Restricted 'A' Class: NOW600 National Micros with NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros Stock Non-Wing: NOW600 Non-Wing Micros Junior Sprints | Results | | Shawn Mahaffey (Restricted 'A' Class) | 2nd | - | - | 1st |
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| 6/22/2018 | Red Dirt Raceway - Meeker, OK Sooner 600 Week - Night 3 Restricted 'A' Class: NOW600 National Micros with NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros Stock Non-Wing: NOW600 Non-Wing Micros B Modifieds, Hornets, Pure Stock | Results | | Shawn Mahaffey (Restricted 'A' Class) | 3rd | - | - | 1st |
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| 6/23/2018 | Port City Raceway - Tulsa, OK Sooner 600 Week Finale - Lucas Oil NOW600 National Series Restricted 'A' Class: NOW600 National Micros with NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros Stock Non-Wing: NOW600 Non-Wing Micros Winged Outlaw, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 3rd | - | - | 14th |
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| 6/29/2018 | Port City Raceway - Tulsa, OK 7th Annual Donnie Ray Crawford Memorial Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 6th | - | - | 1st |
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| 6/30/2018 | Port City Raceway - Tulsa, OK 7th Annual Donnie Ray Crawford Memorial Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | - | - | - | 1st |
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| 7/6/2018 | Arkoma Speedway - Arkoma, OK Stars and Stripes Shootout 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 | | Shawn Mahaffey (Restricted 'A' Class) | 2nd | - | - | 2nd |
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| 7/7/2018 | Arkoma Speedway - Arkoma, OK Stars and Stripes Shootout - $1000 to win / $100 to start A & NW Restricted 'A' Class: NOW600 National Micros with NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros Stock Non-Wing: NOW600 Non-Wing Micros Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | - | - | - | 2nd |
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| 7/8/2018 | Port City Raceway - Tulsa, OK Restricted 'A' Class: NOW600 National Micros with NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros Stock Non-Wing: NOW600 Non-Wing Micros Winged Outlaw, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 3rd | - | - | 4th |
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| 7/10/2018 | Red Dirt Raceway - Meeker, OK Midgets: USAC National Midgets Stock Non-Wing: NOW600 Non-Wing Micros Open Speedway Midget | Results | | Shawn Mahaffey (Stock Non-Wing) | 2nd | - | - | 9th |
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| 7/14/2018 | Port City Raceway - Tulsa, OK Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 6th | - | - | 9th |
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| 7/21/2018 | Port City Raceway - Tulsa, OK Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 1st | - | - | 1st |
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| 7/27/2018 | Port City Raceway - Tulsa, OK Non-Wing Nationals Winged Outlaw, Non-Wing Outlaw, Restricted 'A' Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 7th | - | - | 7th |
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| 7/28/2018 | Port City Raceway - Tulsa, OK Non-Wing Nationals Winged Outlaw, Non-Wing Outlaw, Restricted 'A' Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 2nd | - | - | 15th |
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| 8/3/2018 | I-44 Riverside Speedway - Oklahoma City, OK 19th Annual Mini Sprint Nationals - Night one Non-Wing Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints | Results | | Shawn Mahaffey (Restricted 'A' Class) | 5th | - | - | 1st |
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| 8/4/2018 | I-44 Riverside Speedway - Oklahoma City, OK 19th Annual Mini Sprint Nationals - Night two Non-Wing Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints | Results | | Shawn Mahaffey (Restricted 'A' Class) | - | - | - | 1st |
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| 8/11/2018 | Port City Raceway - Tulsa, OK Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 1st | - | - | 1st |
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| 8/18/2018 | Port City Raceway - Tulsa, OK Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 1st | - | - | 1st |
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| 8/25/2018 | Port City Raceway - Tulsa, OK Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 2nd | - | - | 2nd |
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| 9/1/2018 | Sweet Springs Motorsports Complex - Sweet Springs, MO Dean Hathman Memorial Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 1st | - | - | 2nd |
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| 9/2/2018 | Red Dirt Raceway - Meeker, OK East / West Showdown Restricted 'A' Class: NOW600 National Micros with NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros Stock Non-Wing: NOW600 Non-Wing Micros Non-Winged Sprints: United Sprint League Sprint Cars, Economy Sprints - Non Winged | Results | | Shawn Mahaffey (Restricted 'A' Class) | 1st | - | - | 1st |
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| 9/8/2018 | Port City Raceway - Tulsa, OK Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 2nd | - | - | 1st |
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| 9/15/2018 | Port City Raceway - Tulsa, OK Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 4th | - | - | 2nd |
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| 9/21/2018 | Red Dirt Raceway - Meeker, OK 3rd Annual Pat Suchy Classic 305 Sprints - Winged: SSO-Sprint Series of Oklahoma Stock Non-Wing, B Modifieds, Pure Stock | Results | | Shawn Mahaffey (Stock Non-Wing) | 1st | - | - | 4th |
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| 9/22/2018 | Sweet Springs Motorsports Complex - Sweet Springs, MO Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 2nd | - | - | 14th (DNF) |
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| 9/29/2018 | Port City Raceway - Tulsa, OK Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | DNS | - | - | 2nd |
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| 10/6/2018 | Port City Raceway - Tulsa, OK Winged Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 4th | - | - | 6th | | Shawn Mahaffey (Stock Non-Wing) | 5th | - | - | 6th |
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| 10/19/2018 | Port City Raceway - Tulsa, OK 19th Annual Pete Frazier Memorial - NOW600 Lucas Oil National Micros Restricted 'A' Class: NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros Stock Non-Wing: NOW600 Non-Wing Micros Winged Outlaw, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | 1st | - | - | 3rd | | Shawn Mahaffey (Stock Non-Wing) | 3rd | - | 3rd | 19th |
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| 10/20/2018 | Port City Raceway - Tulsa, OK 19th Annual Pete Frazier Memorial - NOW600 Lucas Oil National Micros Restricted 'A' Class: NOW600 Restricted Micros Winged A-Class: NOW600 A-Class Micros Stock Non-Wing: NOW600 Non-Wing Micros Winged Outlaw, Junior Sprints, Sportsman Micros | Results | | Shawn Mahaffey (Restricted 'A' Class) | - | - | - | 2nd | | Shawn Mahaffey (Stock Non-Wing) | 6th | - | 9th | - |
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| 11/3/2018 | Arkoma Speedway - Arkoma, OK 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 | | Shawn Mahaffey (Restricted 'A' Class) | 2nd | - | - | 4th | | Shawn Mahaffey (Stock Non-Wing) | 2nd | - | - | 8th |
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| 11/4/2018 | Arkoma Speedway - Arkoma, OK 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 | | Shawn Mahaffey (Restricted 'A' Class) | 2nd | - | - | 2nd | | Shawn Mahaffey (Stock Non-Wing) | 2nd | - | - | 11th |
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| 12/31/2018 | Tulsa Expo Raceway - Tulsa, OK Early Parking Winged Outlaw: Tulsa Shootout Non-Wing Outlaw, Restricted 'A' Class, Winged A-Class, Stock Non-Wing, Junior Sprints, 600cc Modifieds | Results | | Shawn Mahaffey (Non-Wing Outlaw) | - | - | - | - | | Shawn Mahaffey (Restricted 'A' Class) | - | - | - | - | | Shawn Mahaffey (Winged A-Class) | - | - | - | - | | Shawn Mahaffey (Stock Non-Wing) | - | - | - | - |
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