| Full name: | William C. Gretsinger Jr. |
| Nationality: | American |
| Date of Birth: | Thursday, 15 December 1927 |
| Place of birth: | Dayton, Ohio, USA |
| Date of death: | Sunday, 29 July 1951 |
| Age at death: | 23 years, 223 days (7 months, 14 days) |
| Debut: | 1951 Indianapolis 500 |
| Active years: | 1951 (1) |
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| Rd | Date | Grand Prix | Constructor | Car | Grid | Race | Points | Champ. Points | Rank |
| 1 | 27 May | Switzerland | |||||||
| 2 | 30 May | Indy 500 | Hall-Offenhauser | 33 | Ret | 0 | 0 | NC | |
| 3 | 17 Jun | Belgium | 0 | NC | |||||
| 4 | 1 Jul | France | 0 | NC | |||||
| 5 | 14 Jul | Great Britain | 0 | NC | |||||
| 6 | 29 Jul | Germany | 0 | NC | |||||
| 7 | 16 Sep | Italy | 0 | NC | |||||
| 8 | 28 Oct | Spain | 0 | NC |