William Christopher Gretsinger, Jr.
Birthplace: Dayton, Ohio
Born: December 15, 1927
Died: July 29, 1951
Bill Mackey
William Christopher Gretsinger, Jr.
Birthplace: Dayton, Ohio
Born: December 15, 1927
Died: July 29, 1951
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| Track | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Bay Meadows | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 0 |
| Darlington | 2 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | |
| Detroit-DO | 0 | 1 | 0 | 0 | 0 | 0 | 0 | NS | 0 |
| Indianapolis | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 19 | 0 |
| Milwaukee | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 13 | 0 |
| Phoenix-ASF | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 0 |
| Springfield | 0 | 1 | 0 | 0 | 0 | 0 | 0 | NS | 0 |
| Syracuse | 0 | 1 | 0 | 0 | 0 | 0 | 0 | NS | 0 |
| Chassis | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Meyer | 5 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | |
| Scopa | 0 | 2 | 0 | 0 | 0 | 0 | 0 | NS | 0 |
| Stevens | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 19 | 0 |
| Unknown | 0 | 1 | 0 | 0 | 0 | 0 | 0 | NS | 0 |
| Engine | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Offy | 6 | 2 | 0 | 0 | 0 | 1 | 0 | 0 | |
| Ralph Miller | 0 | 1 | 0 | 0 | 0 | 0 | 0 | NS | 0 |