| Year | Winner | Grand Prix | Race Start |
|---|---|---|---|
| 1912 |
![]() Ralph de Palma 37/90 hp Ralph de Palma |
WK Vanderbilt Cup | 2nd October 1912 |
| 1912 |
Mason
? 1912 Harry Endicott |
Wisconsin Motor Challenge Trophy | 3rd October 1912 |
| 1912 |
Fred P Duesenberg
? 1912 Mortimer Roberts |
Pabst Trophy | 3rd October 1912 |
| Name | Wins | Poles | Points |
|---|---|---|---|
| Ralph de Palma | 1 | 1 | 600 |
| Mortimer Roberts | 1 | 0 | 400 |
| Harry Endicott | 1 | 0 | 350 |
| Name | Wins | Poles | Points |
|---|---|---|---|
| Ralph de Palma | 1 | 1 | 600 |
| Fred P Duesenberg | 1 | 0 | 400 |
Mason
Mercedes
Mercer
Wisconsin
Lozier
Fiat
Knox
Falcar
unknown
Case