Harry Grant Donaldson
Birthplace: Milford, Iowa
Born: October 18, 1890
Died: April 22, 1981
Grant Donaldson
Harry Grant Donaldson
Birthplace: Milford, Iowa
Born: October 18, 1890
Died: April 22, 1981
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| Track | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Des Moines | 0 | 1 | 0 | 0 | 0 | 0 | 0 | NS | 0 |
| Indianapolis | 0 | 1 | 0 | 0 | 0 | 0 | 0 | NS | 0 |
| Sioux City | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 0 |
| Chassis | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Emden | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 7 | 0 |
| Unknown | 0 | 1 | 0 | 0 | 0 | 0 | 0 | NS | 0 |
| Engine | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Emden | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 7 | 0 |
| Unknown | 0 | 1 | 0 | 0 | 0 | 0 | 0 | NS | 0 |