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| 6/18/2021 | Dallas County Speedway (MO) - Urbana, MO Bull Ring Cup Mid Season Championship Midwest Modifieds, Pony Stock, Pure Stock, USRA B-Mods, USRA Stock Cars | Results | | Rex Harris (USRA B-Mods) | 4th | - | - | - |
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| 6/19/2021 | Lake Ozark Speedway - Eldon, MO LOS Night at the Races Lightning Sprints: POWRi Midwest Lightning Sprints 305 Sprints - Winged, Super Stocks, Pure Stock, USRA B-Mods | Results | | Rex Harris (USRA B-Mods) | DNS | - | - | 5th |
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| 6/25/2021 | Midway Speedway - Lebanon, MO | Results | | Rex Harris (USRA B-Mods) | - | - | - | 5th |
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| 7/1/2021 | Lucas Oil Speedway - Wheatland, MO Weekly #9- Casey's General Stores Thursday Night Thunder Kids Night at the Races plus Fireworks Dirt Late Models, USRA B-Mods, USRA Modifieds, USRA Stock Cars | Results | | Rex Harris (USRA B-Mods) | 7th | - | 12th (DNF) | - |
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| 7/3/2021 | Lake Ozark Speedway - Eldon, MO 1st Annual POWRi RaceSaver Sprint Independence Nationals Lightning Sprints: POWRi Midwest Lightning Sprints 305 Sprints - Winged, Midwest Modifieds, USRA B-Mods | Results | | Rex Harris (USRA B-Mods) | 1st | - | - | 4th |
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| 7/23/2021 | Midway Speedway - Lebanon, MO | Results | | Rex Harris (USRA B-Mods) | - | - | - | DNS |
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| 7/24/2021 | Central Missouri Speedway - Warrensburg, MO Race #16, KMZU 'The Farm' 100.7 FM Race Night - Weekly Racing #12 Hobby Stocks, A Modifieds, B Modifieds, Super Stocks | Results | | Rex Harris (B Modifieds) | 3rd | - | - | 11th |
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| 7/31/2021 | Lake Ozark Speedway - Eldon, MO LOS Night at the Races 360 Sprints - Winged, Midwest Modifieds, Super Stocks, Pure Stock, USRA B-Mods | Rain Out |
| 8/6/2021 | Dallas County Speedway (MO) - Urbana, MO Bull Ring Cup #10 Pure Stock Round Up Midwest Modifieds, Pony Stock, Pure Stock, USRA B-Mods, USRA Stock Cars | Results | | Rex Harris (USRA B-Mods) | 3rd | - | - | 2nd |
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| 8/7/2021 | Lake Ozark Speedway - Eldon, MO LOS Night at the Races 305 Sprints - Winged, Dirt Late Models, Super Stocks, Pure Stock, USRA B-Mods | Results | | Rex Harris (USRA B-Mods) | 3rd | - | - | 3rd |
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| 8/13/2021 | Dallas County Speedway (MO) - Urbana, MO Bull Ring Cup #11 Kids Night Midwest Modifieds, Pony Stock, Pure Stock, USRA B-Mods, USRA Stock Cars | Results | | Rex Harris (USRA B-Mods) | 6th | - | - | 20th |
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| 8/14/2021 | Lake Ozark Speedway - Eldon, MO 1st Annual Lucas Oil MLRA Battle at the Beach Dirt Super Late Models: Lucas Oil MLRA Midwest Modifieds, Super Stocks, USRA B-Mods | Results | | Rex Harris (USRA B-Mods) | 2nd | - | - | 7th |
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| 8/20/2021 | Dallas County Speedway (MO) - Urbana, MO Midwest Modifieds, Pony Stock, Pure Stock, USRA B-Mods, USRA Stock Cars | Results | | Rex Harris (USRA B-Mods) | 2nd | - | - | 6th |
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| 8/21/2021 | Lake Ozark Speedway - Eldon, MO POWRi Lucas Oil WAR Sprints at Lake Ozark Speedway Non-Winged Sprints: POWRi WAR Sprints 360 Sprints - Winged, Midgets, Super Stocks, Pure Stock, USRA B-Mods | Results | | Rex Harris (USRA B-Mods) | 3rd | - | - | 6th |
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| 8/27/2021 | Dallas County Speedway (MO) - Urbana, MO DCS Bull Ring Cup Championship Midwest Modifieds, Pony Stock, Pure Stock, USRA B-Mods, USRA Stock Cars | Results | | Rex Harris (USRA B-Mods) | 1st | - | - | 17th |
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| 8/28/2021 | Lucas Oil Speedway - Wheatland, MO Weekly Show #14- Rempfer Memorial Season Championship Night Dirt Late Models, USRA B-Mods, USRA Modifieds, USRA Stock Cars | Results | | Rex Harris (USRA B-Mods) | 8th | - | 2nd | 7th |
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| 9/10/2021 | Midway Speedway - Lebanon, MO USRA B-Mods, USRA Stock Cars | Results | | Rex Harris (USRA B-Mods) | - | - | - | 13th |
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| 9/11/2021 | Midway Speedway - Lebanon, MO USRA B-Mods, USRA Stock Cars | Results | | Rex Harris (USRA B-Mods) | - | - | - | 9th |
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| 10/1/2021 | Midway Speedway - Lebanon, MO USRA B-Mods, USRA Stock Cars | Results | | Rex Harris (USRA B-Mods) | - | - | - | 3rd |
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| 10/9/2021 | Monett Motor Speedway - Monett, MO Fall Weekly Race 4 Factory Stocks, Hobby Stocks, Stock Cars, Midwest Modifieds, B Modifieds, Street Stocks, Pure Stock | Results | | Rex Harris (B Modifieds) | 1st | - | - | 3rd |
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| 10/22/2021 | Midway Speedway - Lebanon, MO USRA B-Mods, USRA Stock Cars | Results | | Rex Harris (USRA B-Mods) | - | - | - | 3rd |
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