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