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| 6/19/2015 | Rapid Speedway - Rock Rapids, IA Regular Classes + OneMain Financial WISSOTA Late Model Challenge Series DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds, Dirt Late Models | Results | | Nate Mosterd (B Modifieds) | 6th | - | - | 11th |
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| 6/26/2015 | Rapid Speedway - Rock Rapids, IA Regular Classes + MSTS 360 Sprints (Mid-Season Championship) 360 Sprints - Winged: Minnesota Mafia with Midwest Sprint Touring Series DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Nate Mosterd (B Modifieds) | 7th | - | - | 14th (DNF) |
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| 7/15/2015 | Sioux Speedway - Sioux Center, IA 6th Annual Sprint Car Showdown 360 Sprints - Winged: Midwest Sprint Touring Series Hobby Stocks, Stock Cars, B Modifieds | Results | | Nate Mosterd (B Modifieds) | 5th | - | - | 12th |
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| 7/21/2015 | Rapid Speedway - Rock Rapids, IA USMTS + Ironman Stock Car & B-Mod A Modifieds: USMTS - United States Modified Touring Series DIRTcar UMP Modifieds, Stock Cars, B Modifieds | Results | | Nate Mosterd (B Modifieds) | 6th | - | - | 17th |
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| 7/31/2015 | Rapid Speedway - Rock Rapids, IA Regular Classes + SLMR Dirt Super Late Models: SLMR Late Model Series DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Nate Mosterd (B Modifieds) | 7th | - | - | 15th (DNF) |
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