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| 6/19/2015 | Winston Speedway - Rothbury, MI Full Program - Street Stock Special Presented by Grasmeyer Bros. L.LC. / Late Models $1000 to Win DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, B Modifieds, Street Stocks, Hornets | Results | | Matt Sprague (DIRTcar Late Models) | 1st | - | - | 4th |
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| 6/26/2015 | Winston Speedway - Rothbury, MI Kids Night -Fun and Games, Bike Giveaways & More / Roll Over Contest DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, B Modifieds, Street Stocks, Hornets | Results | | Matt Sprague (DIRTcar Late Models) | 6th | - | - | 6th |
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| 7/3/2015 | Winston Speedway - Rothbury, MI Full Program - Fireworks!!! - Street Stock Special Presented by APS Performance Collison DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, B Modifieds, Street Stocks, Hornets | Results | | Matt Sprague (DIRTcar Late Models) | 4th | - | - | 7th |
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| 7/17/2015 | Winston Speedway - Rothbury, MI Full Program - Bomber Special Tim Epplett Memorial - Presented by Bolduc's Complete Automotive DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, B Modifieds, Street Stocks, Hornets | Results | | Matt Sprague (DIRTcar Late Models) | 8th | - | - | 5th |
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| 7/24/2015 | Winston Speedway - Rothbury, MI Kenny Blondel Memorial-55 Lap for Street Stocks-Presented by Port City Racecars DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, B Modifieds, Street Stocks, Hornets | Results | | Matt Sprague (DIRTcar Late Models) | 4th | - | - | 10th |
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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 | | Matt Sprague (DIRTcar Late Models) | 3rd | - | - | 14th |
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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 | | Matt Sprague (DIRTcar Late Models) | 5th | - | - | 12th |
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| 8/28/2015 | Winston Speedway - Rothbury, MI Back to School / Season Championship Night DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, B Modifieds, Street Stocks, Hornets | Results | | Matt Sprague (DIRTcar Late Models) | 3rd | - | - | 4th |
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| 9/4/2015 | Winston Speedway - Rothbury, MI Full Program - Stock Car Special / MI Dirt Mod Special / 4 Cyl. Special DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, B Modifieds | Results | | Matt Sprague (DIRTcar Late Models) | 5th | - | - | 10th |
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| 9/11/2015 | Winston Speedway - Rothbury, MI Full Show DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, B Modifieds, Street Stocks, Hornets | Results | | Matt Sprague (DIRTcar Late Models) | 5th | - | - | 6th |
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