Robert Clayton Groff
Birthplace: Mission Hills, California
Born: January 31, 1966
Died:
Robbie Groff
Robert Clayton Groff
Birthplace: Mission Hills, California
Born: January 31, 1966
Died:
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| Track | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Charlotte-PO | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 13 | 0 |
| Ft. Worth | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 15 | 0 |
| Indianapolis | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 9 | 0 |
| Las Vegas-PO | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 18 | 0 |
| Long Beach | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 13 | 0 |
| Loudon | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 10 | 0 |
| Orlando | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 28 | 0 |
| Phoenix-PIR | 0 | 1 | 0 | 0 | 0 | 0 | 0 | NS | 0 |
| Portland | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 13 | 0 |
| PPIR | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 10 | 0 |
| Chassis | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Dallara | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 28 | 0 |
| G-Force | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 9 | 0 |
| Penske | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 13 | 0 |
| Engine | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Ilmor | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 13 | 0 |
| Oldsmobile | 7 | 1 | 0 | 0 | 0 | 0 | 0 | 9 | 0 |