400 m, Men
| Competition | 1920 South American Athletics Championships |
|---|---|
| Venue |
Santiago
 CHI
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Isabelino Gradín |  URU |
54.0 | ||
| 🥈 | Eduardo Flores | URU |
54.6 | ||
| 🥉 | Gavino Reginato | CHI |
— |