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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 | | Andy Sprague (DIRTcar UMP Modifieds) | 1st | - | - | 5th |
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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 | | Andy Sprague (DIRTcar UMP Modifieds) | 1st | - | - | 3rd |
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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 | | Andy Sprague (DIRTcar UMP Modifieds) | 3rd | - | - | 9th |
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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 | | Andy Sprague (DIRTcar UMP Modifieds) | 4th | - | - | 7th |
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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 | | Andy Sprague (DIRTcar UMP Modifieds) | 4th | - | - | 16th |
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| 6/5/2015 | Winston Speedway - Rothbury, MI Full Program - American Ethanol Late Model Tour - Warrior Special DIRTcar Late Models: American Ethanol Dirt Racing Group DIRTcar UMP Modifieds, Factory Stocks, Stock Cars, B Modifieds, Street Stocks, Hornets | Results | | Andy Sprague (DIRTcar UMP Modifieds) | 7th | - | - | 6th |
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| 6/6/2015 | Merritt Speedway - Merritt, MI Summer Showdown Prelude - Presented by Lane Automotive DIRTcar Late Models, DIRTcar UMP Modifieds, Factory Stocks, Sportsmans, Lightning Sprints, Dirt Pro Trucks | Results | | Andy Sprague (DIRTcar UMP Modifieds) | 3rd | - | - | 4th |
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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 | | Andy Sprague (DIRTcar UMP Modifieds) | 8th | - | - | - |
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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 | | Andy Sprague (DIRTcar UMP Modifieds) | 4th | - | - | 16th |
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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 | | Andy Sprague (DIRTcar UMP Modifieds) | 2nd | - | - | 1st |
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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 | | Andy Sprague (DIRTcar UMP Modifieds) | 1st | - | - | 4th |
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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 | | Andy Sprague (DIRTcar UMP Modifieds) | 7th | - | 10th | - |
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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 | | Andy Sprague (DIRTcar UMP Modifieds) | 5th | - | 1st | 18th |
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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 | | Andy Sprague (DIRTcar UMP Modifieds) | 2nd | - | - | 3rd |
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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 | | Andy Sprague (DIRTcar UMP Modifieds) | 3rd | - | - | 4th |
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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 | | Andy Sprague (DIRTcar UMP Modifieds) | 3rd | - | - | - |
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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 | | Andy Sprague (DIRTcar UMP Modifieds) | 4th | - | - | 8th |
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