| | Heat | Dash | B Feature | A Feature |
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| 5/18/2012 | Rapid Speedway - Rock Rapids, IA 410 Outlaw Sprint Special 410 Sprints - Winged, Hobby Stocks, Stock Cars, B Modifieds, Limited 360 Sprints - Non-Winged | Results | | Leon Mulder (B Modifieds) | 3rd | - | - | 2nd |
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| 6/1/2012 | Rapid Speedway - Rock Rapids, IA Regular Scheduled Race Event DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds, Limited 360 Sprints - Non-Winged | Results | | Leon Mulder (B Modifieds) | 2nd | - | - | 2nd |
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| 6/15/2012 | Rapid Speedway - Rock Rapids, IA 360 Winged Sprint Car Special! 360 Sprints - Winged, DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds, Limited 360 Sprints - Non-Winged | Results | | Leon Mulder (B Modifieds) | 1st | - | - | 6th |
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| 6/29/2012 | Rapid Speedway - Rock Rapids, IA Regular Scheduled Race Event DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds, Limited 360 Sprints - Non-Winged | Results | | Leon Mulder (B Modifieds) | 3rd | - | - | 2nd |
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| 7/6/2012 | Rapid Speedway - Rock Rapids, IA 360 Sprints - Winged: ASCS National with ASCS Midwest Region Stock Cars, B Modifieds, Limited 360 Sprints - Non-Winged | Results | | Leon Mulder (B Modifieds) | 3rd | - | - | 12th (DNF) |
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| 7/24/2012 | Rapid Speedway - Rock Rapids, IA Lyon County Fair Races! DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds | Results | | Leon Mulder (B Modifieds) | 6th (DNF) | - | - | 11th |
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| 7/27/2012 | Rapid Speedway - Rock Rapids, IA Precision Auto Body and DeRuyter Pallets Stock Car King of the Hill Challenge! DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds, Limited 360 Sprints - Non-Winged | Results | | Leon Mulder (B Modifieds) | 8th (DNF) | - | - | DNS |
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| 8/10/2012 | Rapid Speedway - Rock Rapids, IA Double Feature Night for Hobbys and Stock Cars! DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds, Limited 360 Sprints - Non-Winged | Results | | Leon Mulder (B Modifieds) | 1st | - | - | 2nd |
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| 8/31/2012 | Rapid Speedway - Rock Rapids, IA Kids for Free!! Season Championship Night! DIRTcar Sportsmans, Hobby Stocks, Stock Cars, B Modifieds, Limited 360 Sprints - Non-Winged | Results | | Leon Mulder (B Modifieds) | 2nd | - | - | 6th |
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