| Year | Winner | Grand Prix | Race Start |
|---|---|---|---|
| 1915 |
Duesenberg Bros
? 1915 Eddie O'Donnell |
Los Angeles 100 | 7th February 1915 |
| 1916 |
William Weightman
? 1916 Eddie Rickenbacher |
Ascot Derby | 30th November 1916 |
| 1917 |
Stutz Motor Car Co
? 1917 Earl Cooper |
George Washington Sweepstakes | 4th March 1917 |
| 1917 |
Frontenac Motors
? 1917 Louis Chevrolet |
Ascot Park Race One | 29th November 1917 |
| 1917 |
Duesenberg Bros
? 1917 Eddie Hearne |
Ascot Park Race Two | 29th November 1917 |
| 1919 |
![]() Roamer ? 1919 Roscoe Sarles |
Los Angeles 150 | 23rd March 1919 |
| Name | Wins | Poles | Points |
|---|---|---|---|
| Eddie Rickenbacher | 1 | 1 | 700 |
| Earl Cooper | 1 | 0 | 560 |
| Roscoe Sarles | 1 | 0 | 300 |
| Eddie Hearne | 1 | 1 | 266 |
| Eddie O'Donnell | 1 | 1 | 200 |
| Louis Chevrolet | 1 | 1 | 50 |
| Name | Wins | Poles | Points |
|---|---|---|---|
| Duesenberg Bros | 2 | 2 | 416 |
| William Weightman | 1 | 1 | 715 |
| Stutz Motor Car Co | 1 | 0 | 560 |
| Roamer | 1 | 0 | 300 |
| Frontenac Motors | 1 | 2 | 50 |
Duesenberg
Duesenberg
Frontenac
Stutz
Duesenberg
Duesenberg
Miller
Wisconsin
Mercer
Miller
Hudson
Stutz
Hudson
Kissell
unknown
Wisconsin
Mercer
unknown
Duesenberg
Hudson
Mercer
Stutz
Ford
Fraschini
Alco
Marmon