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4/15/2023 | Waynesfield Raceway Park - Waynesfield, OH NRA Opening Night 360 Sprints - Winged: NRA Sprint Invaders with GLSS-Great Lakes Super Sprints 410 Sprints - Non-Winged: Great Lakes Traditional Sprints DIRTcar UMP Modifieds | Results | Jeff Koz (DIRTcar UMP Modifieds) | 3rd | - | - | 16th |
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5/5/2023 | Limaland Motorsports Park - Lima, OH Season Opening Shootout! 360 Sprints - Winged: NRA Sprint Invaders DIRTcar UMP Modifieds, Stock Cars, Winged Outlaw | Results | Jeff Koz (DIRTcar UMP Modifieds) | 2nd | - | - | 17th (DNF) |
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5/12/2023 | Limaland Motorsports Park - Lima, OH Mike Streicher Memorial - Presented by Post Printing Midgets, DIRTcar UMP Modifieds, Stock Cars, Dirt Pro Trucks | Results | Jeff Koz (DIRTcar UMP Modifieds) | 2nd | - | - | 19th (DNF) |
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5/19/2023 | Limaland Motorsports Park - Lima, OH Run for the Rabbit! 360 Sprints - Winged: NRA Sprint Invaders DIRTcar UMP Modifieds, Stock Cars, Winged Outlaw | Results | Jeff Koz (DIRTcar UMP Modifieds) | 2nd | - | - | 6th |
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5/26/2023 | Limaland Motorsports Park - Lima, OH Memorial Cup 360 Sprints - Winged: NRA Sprint Invaders DIRTcar UMP Modifieds, Stock Cars, Winged Outlaw | Results | Jeff Koz (DIRTcar UMP Modifieds) | 1st | - | - | 22nd (DNF) |
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6/2/2023 | Limaland Motorsports Park - Lima, OH 21st Annual Keyser Memorial 410 Sprints - Non-Winged: Great Lakes Traditional Sprints DIRTcar UMP Modifieds, Stock Cars, Dirt Pro Trucks | Results | Jeff Koz (DIRTcar UMP Modifieds) | 2nd | - | - | 5th |
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6/9/2023 | Limaland Motorsports Park - Lima, OH Ron Kale Jr Memorial 360 Sprints - Winged: NRA Sprint Invaders DIRTcar UMP Modifieds, Stock Cars | Results | Jeff Koz (DIRTcar UMP Modifieds) | 1st | - | - | 5th |
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6/10/2023 | Waynesfield Raceway Park - Waynesfield, OH 360 Sprints - Winged: NRA Sprint Invaders with GLSS-Great Lakes Super Sprints DIRTcar UMP Modifieds, Dirt Pro Trucks, Sport Compact, Super Stocks | Results | Jeff Koz (DIRTcar UMP Modifieds) | 1st | - | - | 2nd |
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6/16/2023 | Limaland Motorsports Park - Lima, OH Family Fun Night - Presented by University of Northwestern Ohio Midgets, DIRTcar UMP Modifieds, Stock Cars, Dirt Pro Trucks | Results | Jeff Koz (DIRTcar UMP Modifieds) | 9th | - | - | - |
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6/23/2023 | Limaland Motorsports Park - Lima, OH Tribute to Mr Excitement, Tim Allison 360 Sprints - Winged: NRA Sprint Invaders DIRTcar UMP Modifieds, Stock Cars, Winged Outlaw | Results | Jeff Koz (DIRTcar UMP Modifieds) | DNS | - | DNS | - |
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6/30/2023 | Limaland Motorsports Park - Lima, OH Firecracker Friday 360 Sprints - Winged: NRA Sprint Invaders DIRTcar UMP Modifieds, Stock Cars | Results | Jeff Koz (DIRTcar UMP Modifieds) | 2nd | - | - | 3rd |
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7/14/2023 | Limaland Motorsports Park - Lima, OH Meet the Drivers Night 360 Sprints - Winged: NRA Sprint Invaders DIRTcar UMP Modifieds, Stock Cars, Winged Outlaw | Results | Jeff Koz (DIRTcar UMP Modifieds) | 3rd | - | - | 8th |
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7/21/2023 | Limaland Motorsports Park - Lima, OH K & L Ready Mix Clash 360 Sprints - Winged: NRA Sprint Invaders DIRTcar UMP Modifieds, Stock Cars, Winged Outlaw | Results | Jeff Koz (DIRTcar UMP Modifieds) | 1st | - | - | 4th |
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7/22/2023 | Montpelier Motor Speedway - Montpelier, IN In memory of John Halsey DIRTcar UMP Modifieds, Dirt Mini Trucks, Street Stocks, Hornets, Super Stocks, Crown Vic | Results | Jeff Koz (DIRTcar UMP Modifieds) | - | - | - | - |
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7/28/2023 | Limaland Motorsports Park - Lima, OH 26th Annual Championship Night 410 Sprints - Non-Winged: Great Lakes Traditional Sprints DIRTcar UMP Modifieds, Stock Cars | Results | Jeff Koz (DIRTcar UMP Modifieds) | 2nd | - | - | 8th |
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8/4/2023 | Limaland Motorsports Park - Lima, OH Awards Celebration - King of the Quarter Mile: Members and Invites Only 360 Sprints - Winged: NRA Sprint Invaders DIRTcar UMP Modifieds, Stock Cars, Winged Outlaw | Results | Jeff Koz (DIRTcar UMP Modifieds) | - | - | - | 1st |
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10/28/2023 | Waynesfield Raceway Park - Waynesfield, OH BOSS Sprints DIRTcar UMP Modifieds, 410 Sprints - Non-Winged, Dirt Pro Trucks, Sport Compact | Results | Jeff Koz (DIRTcar UMP Modifieds) | 2nd | - | - | 2nd |
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