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| 4/17/2015 | Winston Speedway - Rothbury, MI Full Program – Best Appearing Car Award For Each Class DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, B Modifieds, Street Stocks, Hornets | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 2nd | - | - | 3rd |
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| 4/24/2015 | Winston Speedway - Rothbury, MI 9th Annual All-Star Performance 50 Sunoco American Late Model Series DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, B Modifieds, Street Stocks, Hornets | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 1st | - | - | 3rd |
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| 5/1/2015 | Winston Speedway - Rothbury, MI Full Program - Street Stock Special presented by Mr. B's Pancake House DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, B Modifieds, Street Stocks, Hornets | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 9th | - | - | 9th |
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| 5/8/2015 | Winston Speedway - Rothbury, MI Michigan Dirt Cup Season Opener DIRTcar UMP Modifieds: Michigan Dirt Cup Modified Tour DIRTcar Late Models, Factory Stocks, Stock Cars, B Modifieds, Street Stocks, Hornets | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 5th | - | - | 5th |
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| 5/15/2015 | I-96 Speedway - Lake Odessa, MI Spring Brawl DIRTcar UMP Modifieds: Michigan Dirt Cup Modified Tour Asphalt Mini Stocks, B Modifieds, Street Stocks | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 2nd | - | - | 6th |
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| 5/16/2015 | Merritt Speedway - Merritt, MI Crank it Up Opening Night - $6 TICKETS DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, Sportsmans, Lightning Sprints, Dirt Pro Trucks | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 3rd | - | - | 22nd |
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| 5/22/2015 | Mount Pleasant Speedway - Mount Pleasant, MI Memorial Day Shootout DIRTcar UMP Modifieds, Hobby Stocks, Stock Cars, B Modifieds | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 4th | - | - | 15th |
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| 6/10/2015 | Merritt Speedway - Merritt, MI 1st Annual Merritt Showdown DIRTcar Late Models: American Ethanol Dirt Racing Group DIRTcar UMP Modifieds: Michigan Dirt Cup Modified Tour Stock Cars, Sportsmans, Lightning Sprints | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 6th | - | 6th | 10th |
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| 6/12/2015 | Cherry Raceway - Fife Lake, MI American Flag Day DIRTcar UMP Modifieds: Michigan Dirt Cup Modified Tour Stock Cars, Street Stocks, Hornets | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 1st | - | - | 7th |
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| 6/19/2015 | I-96 Speedway - Lake Odessa, MI Drive your Tractor to the Races Get in FREE! - Amercian Ethanol Late Model Tour DIRTcar Late Models, DIRTcar UMP Modifieds, Asphalt Mini Stocks, B Modifieds, Street Stocks | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 1st | - | - | 14th |
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| 6/27/2015 | Merritt Speedway - Merritt, MI Factory Stock / 4-Cylinder Night DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, Sportsmans, Lightning Sprints | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 4th | - | - | 3rd |
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| 7/1/2015 | Daugherty Speedway - Chase, IN Hell Tour @ Daugherty DIRTcar Late Models, DIRTcar UMP Modifieds | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 6th | - | 2nd | 12th |
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| 7/2/2015 | LaSalle Speedway - Lasalle, IL Hell Tour @ LaSalle DIRTcar Late Models, DIRTcar UMP Modifieds, Street Stocks | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 2nd | - | - | 9th |
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| 7/3/2015 | Hartford Speedway - Hartford, MI Independence 40 presented by Lane Automotive DIRTcar UMP Modifieds: Michigan Dirt Cup Modified Tour | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 3rd | - | - | 5th |
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| 7/11/2015 | Oakshade Raceway - Wauseon, OH Hell Tour 2015 Championship @ Oakshade DIRTcar Late Models, DIRTcar UMP Modifieds | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 2nd | - | - | 3rd |
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| 7/18/2015 | Merritt Speedway - Merritt, MI DIRTcar UMP Modifieds: Michigan Dirt Cup Modified Tour Factory Stocks, Stock Cars, Sportsmans, Dirt Pro Trucks | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 5th | - | - | 7th |
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| 7/24/2015 | Fairbury Speedway - Fairbury, IL Summit Racing Equipment 2015 Championship Weekend Dirt Super Late Models, DIRTcar UMP Modifieds | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 3rd | - | - | 17th |
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| 7/25/2015 | Fairbury Speedway - Fairbury, IL Summit Racing Equipment 2015 Championship Weekend Dirt Super Late Models, DIRTcar UMP Modifieds | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 12th | - | 8th | 13th |
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| 7/31/2015 | Cherry Raceway - Fife Lake, MI Chemical Bank / Scout Night (All Scouts in Uniform Get into the grandstands Free!!) DIRTcar UMP Modifieds, Stock Cars, Street Stocks, Hornets, Lightning Sprints | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 3rd | - | - | 1st |
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| 8/7/2015 | I-96 Speedway - Lake Odessa, MI 410 Sprints - Winged, DIRTcar UMP Modifieds, Asphalt Mini Stocks, B Modifieds, Street Stocks | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 4th | - | - | 5th |
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| 8/14/2015 | Winston Speedway - Rothbury, MI Fan Appreciation Night- UMP Modified Special Presented by Port City Racecars DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, B Modifieds, Street Stocks, Hornets | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 2nd | - | - | 4th |
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| 8/21/2015 | Winston Speedway - Rothbury, MI Full Program - American Ethanol Late Model Tour DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, B Modifieds, Street Stocks, Hornets | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 3rd | - | - | 8th |
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| 8/22/2015 | Merritt Speedway - Merritt, MI 360 Sprints - Winged: SOD-Sprints On Dirt (360s) DIRTcar UMP Modifieds: Michigan Dirt Cup Modified Tour 410 Sprints - Non-Winged: Great Lakes Traditional Sprints with Ontario Topless Sprint Cars-OTS Lightning Sprints | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 1st | - | - | 5th |
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| 8/28/2015 | I-96 Speedway - Lake Odessa, MI 410 Sprints - Winged, DIRTcar UMP Modifieds, Asphalt Mini Stocks, B Modifieds, Street Stocks | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 1st | - | - | 1st |
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| 9/4/2015 | Hartford Speedway - Hartford, MI 360 Sprints - Winged: SOD-Sprints On Dirt (360s) DIRTcar UMP Modifieds: Michigan Dirt Cup Modified Tour | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 4th | - | - | 5th |
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| 9/12/2015 | Oakshade Raceway - Wauseon, OH Michigan Dirt Cup Championship DIRTcar UMP Modifieds: Michigan Dirt Cup Modified Tour | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 3rd | - | - | 2nd |
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| 9/18/2015 | Berlin Raceway - Marne, MI Dirt Cup Fall Nationals - Round 1 DIRTcar UMP Modifieds | Rain Out |
| 9/19/2015 | Berlin Raceway - Marne, MI | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 3rd | - | - | 7th |
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| 9/26/2015 | Berlin Raceway - Marne, MI 410 Sprints - Winged: World of Outlaws DIRTcar UMP Modifieds | Results | | Collin Thirlby (DIRTcar UMP Modifieds) | 2nd | - | - | 4th |
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