| | Heat | Dash | B Feature | A Feature |
|---|
|
|---|
| 4/17/2021 | Warren County Speedway - Indianola, IA Season Opener - "Bones" Memorial Factory Stocks, Hobby Stocks, Stock Cars, Sportsmans, Winged A-Class, Street Stocks, Hornets, Dirt Pro Trucks, Sport Compact, Super Stocks | Results | | Mike Duncan (Dirt Pro Trucks) | 4th | - | - | 3rd |
|
| 5/22/2021 | Warren County Speedway - Indianola, IA Max Keller Memorial - Keller's Garage Factory Stocks, Hobby Stocks, Stock Cars, Sportsmans, Winged A-Class, Street Stocks, Hornets, Dirt Pro Trucks, Sport Compact, Super Stocks | Results | | Mike Duncan (Dirt Pro Trucks) | 4th | - | - | DNS |
|
| 6/5/2021 | Warren County Speedway - Indianola, IA Little League Baseball/Softball Night - Phillips' Floors Factory Stocks, Hobby Stocks, Stock Cars, Sportsmans, Winged A-Class, Street Stocks, Hornets, Dirt Pro Trucks, Sport Compact, Super Stocks | Results | | Mike Duncan (Dirt Pro Trucks) | 4th | - | - | 5th |
|
| 6/19/2021 | Warren County Speedway - Indianola, IA Kids Night! - Bussanmas Heating & Cooling Factory Stocks, Hobby Stocks, Stock Cars, Winged A-Class, Street Stocks, Hornets, Dirt Pro Trucks, Sport Compact | Results | | Mike Duncan (Dirt Pro Trucks) | 6th | - | - | 5th |
|
| 6/26/2021 | Warren County Speedway - Indianola, IA Military Appreciation Night - Williams Machine Shop Factory Stocks, Hobby Stocks, Stock Cars, Winged A-Class, Street Stocks, Hornets, Dirt Pro Trucks, Sport Compact | Results | | Mike Duncan (Dirt Pro Trucks) | 3rd | - | - | 4th |
|
| 7/3/2021 | Dallas County Speedway (IA) - Adel, IA Red, White and Blue Race Night / Fireworks Hobby Stocks, Hornets, Enduro, Sport Compact, Super Stocks, Figure 8 - FWD Stock, Figure 8 - RWD-Stock, Figure 8 - RWD-Open | Results | | Mike Duncan (Super Stocks) | 1st | - | - | 1st |
|
| 7/10/2021 | Dallas County Speedway (IA) - Adel, IA Dallas County Fair Race Night Hobby Stocks, Hornets, Enduro, Sport Compact, Super Stocks, Figure 8 - FWD Stock, Figure 8 - RWD-Stock, Figure 8 - RWD-Open | Results | | Mike Duncan (Super Stocks) | 1st | - | - | - |
|
| 7/17/2021 | Warren County Speedway - Indianola, IA First Responder's Night - Aubert's Towing Factory Stocks, Hobby Stocks, Stock Cars, Sportsmans, Winged A-Class, Street Stocks, Hornets, Dirt Pro Trucks, Sport Compact, Super Stocks | Results | | Mike Duncan (Dirt Pro Trucks) | 5th | - | - | 3rd |
|
| 7/30/2021 | Warren County Speedway - Indianola, IA Warren County Fair Race! Factory Stocks, Hobby Stocks, Stock Cars, Sportsmans, Winged A-Class, Street Stocks, Hornets, Dirt Pro Trucks, Sport Compact, Super Stocks | Results | | Mike Duncan (Dirt Pro Trucks) | 4th | - | - | 1st |
|
| 8/21/2021 | Warren County Speedway - Indianola, IA Season Championship - TruBank Bike Giveaway - Double Feature's! Factory Stocks, Hobby Stocks, Stock Cars, Sportsmans, Winged A-Class, Street Stocks, Hornets, Dirt Pro Trucks, Sport Compact, Super Stocks | Results | | Mike Duncan (Dirt Pro Trucks) | - | - | - | 1st |
|
| 8/27/2021 | Dallas County Speedway (IA) - Adel, IA Two Day Race Hobby Stocks, Hornets, Enduro, Sport Compact, Super Stocks, Figure 8 - FWD Stock, Figure 8 - RWD-Stock, Figure 8 - RWD-Open | Results | | Mike Duncan (Super Stocks) | 1st | - | - | - |
|