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| 3/4/2023 | Rocket Raceway Park - Petty, TX 13th Annual Summit Texas Spring Nationals (Day 1 of 2) A Modifieds: USMTS - United States Modified Touring Series DIRTcar UMP Modifieds, B Modifieds, USRA Limited Mods, USRA Factory Stocks, USRA Stock Cars | Results | | Darwin Karau (A Modifieds) | 10th | - | 18th | - |
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| 3/5/2023 | Rocket Raceway Park - Petty, TX 13th Annual Summit Texas Spring Nationals (Day 2 of 2) A Modifieds: USMTS - United States Modified Touring Series DIRTcar UMP Modifieds, B Modifieds, USRA Limited Mods, USRA Modifieds, USRA Factory Stocks, USRA Stock Cars | Results | | Darwin Karau (A Modifieds) | 6th | - | 11th | - |
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| 4/8/2023 | Hamilton County Speedway - Webster City, IA Season Opener + Kids Night USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Darwin Karau (USRA Modifieds) | 9th (DNF) | - | - | 12th |
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| 4/27/2023 | Hamilton County Speedway - Webster City, IA 13th Annual Spring Classic (Day 1 of 3) A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, IMCA Modified | Results | | Darwin Karau (A Modifieds) | 9th | - | 17th | - |
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| 5/4/2023 | Mississippi Thunder Speedway - Fountain City, WI World of Outlaws Dairyland Showdown Dirt Super Late Models: World of Outlaws - Late Models USRA Modifieds | Results | | Darwin Karau (USRA Modifieds) | 7th | - | - | 23rd (DNF) |
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| 5/7/2023 | Mason City Motor Speedway - Mason City, IA Season Opener presented by Pritchard Family Auto Stores A Modifieds, 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Darwin Karau (USRA Modifieds) | 2nd | - | - | 8th |
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| 5/19/2023 | Mississippi Thunder Speedway - Fountain City, WI Karl Fenske Memorial presented by Whitewater Chrysler Dodge Jeep Ram A Modifieds, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | Darwin Karau (USRA Modifieds) | 8th | - | - | 21st |
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| 5/20/2023 | Deer Creek Speedway - Spring Valley, MN Rent-N-Save Weekly Racing A Modifieds, 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, IMCA Modified, WISSOTA Midwest Mods | Results | | Darwin Karau (USRA Modifieds) | 8th (DNF) | - | 10th | - |
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| 5/21/2023 | Mason City Motor Speedway - Mason City, IA Mason City Motor Speedway - EAST Dirt Super Late Models: SLMR Late Model Series 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Darwin Karau (USRA Modifieds) | 5th | - | - | 8th |
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| 5/26/2023 | Deer Creek Speedway - Spring Valley, MN 20th Annual Southern MN Spring Challenge (Day 2 of 3) A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods, IMCA Modified | Results | | Darwin Karau (USRA B-Mods) | 7th | - | - | - |
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| 6/3/2023 | Deer Creek Speedway - Spring Valley, MN Weekly Racing USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, WISSOTA Midwest Mods | Results | | Darwin Karau (USRA Modifieds) | 7th (DNF) | - | - | 12th |
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| 6/4/2023 | Mason City Motor Speedway - Mason City, IA Joel Showalter Memorial Presented by Window World 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Darwin Karau (USRA Modifieds) | 4th | - | - | 9th |
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| 6/10/2023 | Deer Creek Speedway - Spring Valley, MN Podein's Power Equipment Weekly Racing A Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, WISSOTA Midwest Mods | Results | | Darwin Karau (USRA Modifieds) | 3rd | - | - | 25th (DNF) |
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| 6/11/2023 | Mason City Motor Speedway - Mason City, IA Farmers Night Presented by Kruger Seeds By Aaron Benson 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Darwin Karau (USRA Modifieds) | 4th | - | - | 7th |
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| 6/17/2023 | Deer Creek Speedway - Spring Valley, MN First Farmers & Merchants Bank - Pink Out Night - Weekly Racing USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, WISSOTA Midwest Mods | Results | | Darwin Karau (USRA Modifieds) | 9th | - | - | 21st |
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| 6/18/2023 | Mason City Motor Speedway - Mason City, IA Jerry Hejna Memorial Presented by Rookies Rockin Sports Bar A Modifieds, 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Darwin Karau (USRA Modifieds) | 7th | - | - | 12th |
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| 6/24/2023 | Deer Creek Speedway - Spring Valley, MN Jone's Ace Hardware - Thunder Summer Series - Weekly Racing USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, WISSOTA Midwest Mods | Rain Out |
| 6/30/2023 | Mississippi Thunder Speedway - Fountain City, WI RacinDirt Thunder Summer Series A Modifieds, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | Darwin Karau (USRA Modifieds) | 6th | - | - | 23rd |
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| 7/1/2023 | Deer Creek Speedway - Spring Valley, MN Medieval Chassis - Fireworks Night - Thunder Summer Series - Weekly Racing A Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, WISSOTA Midwest Mods | Results | | Darwin Karau (USRA Modifieds) | 8th | - | 9th | - |
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| 7/6/2023 | Deer Creek Speedway - Spring Valley, MN NAPA Auto Parts Gopher 50 Dirt Super Late Models: Lucas Oil MLRA with Lucas Oil Late Model Dirt Series A Modifieds, USRA Modifieds | Results | | Darwin Karau (USRA Modifieds) | 8th | - | 5th | 23rd |
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| 7/7/2023 | Deer Creek Speedway - Spring Valley, MN NAPA Auto Parts Gopher 50 Dirt Super Late Models: Lucas Oil MLRA with Lucas Oil Late Model Dirt Series A Modifieds, USRA Modifieds | Results | | Darwin Karau (USRA Modifieds) | 6th | - | 6th | - |
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| 7/8/2023 | Deer Creek Speedway - Spring Valley, MN NAPA Auto Parts Gopher 50 Dirt Super Late Models: Lucas Oil MLRA with Lucas Oil Late Model Dirt Series A Modifieds, USRA Modifieds | Results | | Darwin Karau (USRA Modifieds) | 6th | - | 3rd | 26th |
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| 7/9/2023 | Mason City Motor Speedway - Mason City, IA Late Models Pro Late Model: Pro Late Model Series Dirt Late Models, 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars | Results | | Darwin Karau (USRA Modifieds) | 5th | - | - | 3rd |
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| 7/16/2023 | Mason City Motor Speedway - Mason City, IA Ted Zieman Memorial 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Darwin Karau (USRA Modifieds) | 7th | - | - | 10th |
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| 7/20/2023 | Mason City Motor Speedway - Mason City, IA 10th Annual North Iowa Nationals (Day 1 of 3) A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods, USRA Hobby Stocks, USRA Stock Cars, IMCA Modified | Results | | Darwin Karau (A Modifieds) | 9th | - | 8th | - |
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| 7/21/2023 | Mason City Motor Speedway - Mason City, IA 10th Annual North Iowa Nationals (Day 2 of 3) A Modifieds: USMTS - United States Modified Touring Series Non-Winged Sprints: Western Iowa Non-Wing Sprints - WINS Generic 1, IMCA Modified | Results | | Darwin Karau (A Modifieds) | 2nd | - | - | 20th |
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| 7/22/2023 | Mason City Motor Speedway - Mason City, IA 10th Annual North Iowa Nationals (Day 3 of 3) A Modifieds: USMTS - United States Modified Touring Series Non-Winged Sprints: Western Iowa Non-Wing Sprints - WINS Generic 1, IMCA Modified | Results | | Darwin Karau (A Modifieds) | 8th | - | 11th | - |
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| 7/29/2023 | Deer Creek Speedway - Spring Valley, MN Essig Agency Weekly Racing USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, WISSOTA Midwest Mods | Results | | Darwin Karau (USRA Modifieds) | 5th | - | - | 13th |
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| 7/30/2023 | Mason City Motor Speedway - Mason City, IA Late Models Pro Late Model: Pro Late Model Series 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars | Results | | Darwin Karau (USRA Modifieds) | 2nd | - | - | 11th (DNF) |
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| 8/5/2023 | Deer Creek Speedway - Spring Valley, MN Weekly Racing USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, WISSOTA Midwest Mods | Results | | Darwin Karau (USRA Modifieds) | 7th (DNF) | - | - | 14th |
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| 8/11/2023 | Chateau Speedway - Lansing, MN Season opener Hobby Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds, Hornets, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, WISSOTA Midwest Mods | Canceled |
| 8/12/2023 | Deer Creek Speedway - Spring Valley, MN Rochester Chevrolet - Veterans Night - Weekly Racing USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, WISSOTA Midwest Mods | Results | | Darwin Karau (USRA Modifieds) | 6th | - | - | 18th |
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| 8/16/2023 | Mason City Motor Speedway - Mason City, IA 25th Anniversary USMTS Silver Jubilee (Day 1 of 4) A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods, USRA Stock Cars | Results | | Darwin Karau (A Modifieds) | 8th | - | 6th | 19th |
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| 8/18/2023 | Chateau Speedway - Lansing, MN Friday Night Racing Hobby Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds, Hornets, USRA Hobby Stocks, USRA Stock Cars, WISSOTA Midwest Mods | Results | | Darwin Karau (A Modifieds) | 4th | - | - | 3rd |
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| 8/19/2023 | Mason City Motor Speedway - Mason City, IA 25th Anniversary Silver Jubilee (Day 4 of 4) A Modifieds: USMTS - United States Modified Touring Series USRA Hobby Stocks, IMCA Modified | Results | | Darwin Karau (A Modifieds) | - | - | - | - |
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| 8/25/2023 | Chateau Speedway - Lansing, MN Friday Night Racing Hobby Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds, Hornets, USRA Hobby Stocks, USRA Stock Cars, WISSOTA Midwest Mods | Results | | Darwin Karau (A Modifieds) | 1st | - | - | 10th (DNF) |
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| 8/27/2023 | Mason City Motor Speedway - Mason City, IA Season Championships/Banquet 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Darwin Karau (USRA Modifieds) | 3rd | - | - | 10th (DNF) |
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| 9/15/2023 | Chateau Speedway - Lansing, MN Friday Night Racing Hobby Stocks, Stock Cars, A Modifieds, Midwest Modifieds, B Modifieds, Hornets, USRA Hobby Stocks, USRA Stock Cars, WISSOTA Midwest Mods | Results | | Darwin Karau (A Modifieds) | 4th | - | - | 8th |
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| 9/20/2023 | Deer Creek Speedway - Spring Valley, MN 25th Annual Featherlite Fall Jamboree (Practice) A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods | Results | | Darwin Karau (A Modifieds) | - | - | - | - |
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| 9/21/2023 | Deer Creek Speedway - Spring Valley, MN 25th Annual Featherlite Fall Jamboree (Day 1 of 3) A Modifieds: USMTS - United States Modified Touring Series USRA B-Mods | Results | | Darwin Karau (A Modifieds) | 9th | - | 16th (DNF) | - |
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| 9/29/2023 | Mississippi Thunder Speedway - Fountain City, WI The Great Pumpkin Race Open Dirt Karts, USRA B-Mods, USRA Modifieds, USRA Late Models, USRA Hobby Stocks, USRA Stock Cars | Results | | Darwin Karau (USRA Modifieds) | 9th | - | - | 20th |
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| 10/20/2023 | Mason City Motor Speedway - Mason City, IA Your Life Iowa Five Star Classic Presented by Canadian Pacific Dirt Super Late Models, 600cc Modifieds, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars | Results | | Darwin Karau (USRA Modifieds) | 5th | - | - | 14th |
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| 10/21/2023 | Hamilton County Speedway - Webster City, IA Fall Futurity Night #1 presented by Your Life Iowa Dirt Super Late Models, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars, USRA Tuners | Results | | Darwin Karau (USRA Modifieds) | 6th | - | - | 15th |
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| 10/22/2023 | Hamilton County Speedway - Webster City, IA Fall Futurity Night #2 presented by Your Life Iowa Dirt Super Late Models, USRA B-Mods, USRA Modifieds, USRA Hobby Stocks, USRA Stock Cars | Results | | Darwin Karau (USRA Modifieds) | 5th | - | - | 11th |
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