Indianapolis 500
John Duff Career Stats
| Indianapolis 500 Career Summary | ||||||||
| Starts | Total Laps | Best Start | Best Finish | Top 5 | Top 10 | Races led | Laps led | Winnings |
| 1 | 147 | 28 | 9 | 0 | 1 | 0 | 0 | $1,500 |
| Year | Fin. | St. | Car# | Car Name/Entrant* | C/E/T | Qual. Spd. | Run/Out | Laps | Led | Winnings |
| 1926 | 9 | 28 | 18 | Elcar | Miller/Miller | 95.540 | Running | 147 | 0 | $1,500 |
| Indianapolis 500 Career Summary | ||||||||
| Starts | Total Laps | Best Start | Best Finish | Top 5 | Top 10 | Races led | Laps led | Winnings |
| 1 | 147 | 28 | 9 | 0 | 1 | 0 | 0 | $1,500 |