Cyrus Caswell Marshall
Birthplace: St. Louis, Missouri
Born: April 17, 1902
Died: December 20, 1974
Cy Marshall
Cyrus Caswell Marshall
Birthplace: St. Louis, Missouri
Born: April 17, 1902
Died: December 20, 1974
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| Track | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Indianapolis | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 8 | 0 |
| Chassis | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Alfa Romeo/Weil | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 0 |
| Duesenberg | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 26 | 0 |
| Miller | Relief | drove | only | ||||||
| Ralph Miller | 0 | 1 | 0 | 0 | 0 | 0 | 0 | NS | 0 |
| Engine | Starts | DNS/DNQ | Wins | 2nds | 3rds | 4ths | 5ths | Best Finish | Poles |
| Alfa Romeo | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 0 |
| Duesenberg | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 26 | 0 |
| Miller | Relief | drove | only | ||||||
| Ralph Miller | 0 | 1 | 0 | 0 | 0 | 0 | 0 | NS | 0 |