| | Heat | Dash | B Feature | A Feature |
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| 3/25/1973 | Reading Fairgrounds - Reading, PA 410 Sprints - Non-Winged: USAC National Sprint Cars 305 Sprints - Non-Winged | Results | | Don Nordhorn (305 Sprints - Non-Winged) | - | - | - | 6th |
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| 4/1/1973 | Eldora Speedway - Rossburg, OH 410 Sprints - Non-Winged: USAC National Sprint Cars 305 Sprints - Non-Winged | Results | | Don Nordhorn (305 Sprints - Non-Winged) | - | - | - | 11th |
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| 4/14/1973 | Reading Fairgrounds - Reading, PA 410 Sprints - Non-Winged: USAC National Sprint Cars 305 Sprints - Non-Winged | Results | | Don Nordhorn (305 Sprints - Non-Winged) | - | - | - | 7th |
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| 4/29/1973 | Eldora Speedway - Rossburg, OH 410 Sprints - Non-Winged: USAC National Sprint Cars 305 Sprints - Non-Winged | Results | | Don Nordhorn (305 Sprints - Non-Winged) | - | - | - | 4th |
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| 6/3/1973 | Knoxville Raceway - Knoxville, IA 410 Sprints - Non-Winged: USAC National Sprint Cars 305 Sprints - Non-Winged | Results | | Don Nordhorn (305 Sprints - Non-Winged) | - | - | - | 5th |
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| 6/8/1973 | Indiana State Fairgrounds - Indianapolis, IN 410 Sprints - Non-Winged: USAC National Sprint Cars 305 Sprints - Non-Winged | Results | | Don Nordhorn (305 Sprints - Non-Winged) | - | - | - | 8th |
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| 6/24/1973 | Williams Grove Speedway - Mechanicsburg, PA 410 Sprints - Non-Winged: USAC National Sprint Cars 305 Sprints - Non-Winged | Results | | Don Nordhorn (305 Sprints - Non-Winged) | - | - | - | 10th |
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| 8/19/1973 | Illinois State Fairgrounds - Springfield, IL Silver Crown: USAC Silver Crown | Results | | Don Nordhorn (Silver Crown) | - | - | - | 13th |
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| 8/25/1973 | Minnesota State Fairgrounds - St. Paul, MN | Results | | Don Nordhorn (305 Sprints - Non-Winged) | - | - | - | 9th |
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| 8/26/1973 | Minnesota State Fairgrounds - St. Paul, MN | Results | | Don Nordhorn (305 Sprints - Non-Winged) | - | - | - | 4th |
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| 9/3/1973 | DuQuoin State Fairgrounds - 1 Mile - DU QUOIN, IL Silver Crown: USAC Silver Crown | Results | | Don Nordhorn (Silver Crown) | - | - | - | 23rd |
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| 9/16/1973 | Eldora Speedway - Rossburg, OH 410 Sprints - Non-Winged: USAC National Sprint Cars 305 Sprints - Non-Winged | Results | | Don Nordhorn (305 Sprints - Non-Winged) | - | - | - | 19th |
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| 9/21/1973 | Reading Fairgrounds - Reading, PA 410 Sprints - Non-Winged: USAC National Sprint Cars 305 Sprints - Non-Winged | Results | | Don Nordhorn (305 Sprints - Non-Winged) | - | - | - | 16th |
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| 9/22/1973 | Williams Grove Speedway - Mechanicsburg, PA 410 Sprints - Non-Winged: USAC National Sprint Cars 305 Sprints - Non-Winged | Results | | Don Nordhorn (305 Sprints - Non-Winged) | - | - | - | 11th |
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| 10/21/1973 | Eldora Speedway - Rossburg, OH 410 Sprints - Non-Winged: USAC National Sprint Cars 305 Sprints - Non-Winged | Results | | Don Nordhorn (305 Sprints - Non-Winged) | - | - | - | - |
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