Johnny Seymour Indianapolis 500 Stats
| Starts | Total Laps | Poles | Wins | Top 5 | Top 10 | Races Led | Laps Led | Winnings |
| 6 | 362 | 0 | 0 | 0 | 0 | 0 | 0 | $2,536 |
| Year | Finish | Start | Car Num. | Car Name / Entrant | Make / Model | Qual. Speed | Status | Laps | Led | Winnings |
| 1936 | 31 | 21 | 47 | Sullivan & O'Brien | Stevens / Miller / Firestone | 113.169 | Clutch | 13 | 0 | $280 |
| 1935 | 24 | 27 | 42 | Ford V-8 | Miller-Ford / Ford V8 / Firestone | 112.696 | Grease leak | 71 | 0 | $385 |
| 1934 | 26 | 33 | 33 | Streamline Miller | Adams / Miller / Firestone | 108.591 | Pinion | 22 | 0 | $560 |
| 1930 | 32 | 18 | 39 | Gauss Front Drive | Cooper / Miller / Firestone | 93.376 | Accident | 21 | 0 | $305 |
| 1929 | 21 | 16 | 38 | Cooper | Cooper / Miller / Firestone | 114.307 | Rear axle | 65 | 0 | $438 |
| 1928 | 17 | 11 | 33 | Marmon | Cooper / Miller / Firestone | 111.673 | Supercharger | 170 | 0 | $568 |