Clifford A. Onthank
Listed Hometown: San Francisco, California
Born:
Died:
Clifford Onthank
Clifford A. Onthank
Listed Hometown: San Francisco, California
Born:
Died:
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| Track | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| San Francisco-Portola | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 12 | 0 |
| Chassis | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Unknown | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 12 | 0 |
| Engine | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Unknown | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 12 | 0 |