Harold Bruce Rettberg
Birthplace: Hop Bottom, Pennsylvania
Born: May 30, 1928
Died: March 19, 1994
Hal Rettberg
Harold Bruce Rettberg
Birthplace: Hop Bottom, Pennsylvania
Born: May 30, 1928
Died: March 19, 1994
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| Year | Series | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles | Points | Standing |
| 1961 | USAC | 0 | 1 | 0 | 0 | 0 | 0 | 0 | NS | 0 | 0 |
NR |
| 1964 | USAC | 0 | 3 | 0 | 0 | 0 | 0 | 0 | NS | 0 | 0 | NR |
| Total | 0 | 4 | 0 | 0 | 0 | 0 | 0 | NS | 0 | 0 |
| Track Type | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Dirt Oval | 0 | 2 | 0 | 0 | 0 | 0 | 0 | NS | 0 |
| Paved Oval | 0 | 2 | 0 | 0 | 0 | 0 | 0 | NS | 0 |
| Series | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| USAC | 0 | 4 | 0 | 0 | 0 | 0 | 0 | NS | 0 |
| Start # | Date | Track | Type | Series | Car # | Sponsor/Name | Chassis | Engine | Start | Finish | Laps | Status |
Points |
| -- | 9/24/1961 | Trenton 2 | PO | USAC | 46 | Ray Brady | Kurtis 4000D | Offy | -- | -- | -- | DNS, too slow, S9 | |
| -- | 8/22/1964 | Springfield | DO | USAC | 69 | Rettberg | Ewing | Offy | -- | -- | -- | Mechanical, practice | |
| -- | 9/26/1964 | ISF | DO | USAC | 95 | Mitch Gallas | Kurtis 4000 | Offy | -- | -- | -- | Did not qualify | |
| -- | 9/27/1964 | Trenton 3 | PO | USAC | 69 | Blair | Ewing D | Offy | -- | -- | -- | Did not qualify | |