400 m, Men
| Competition | 1918 South American Athletics Championships |
|---|---|
| Venue |
Buenos Aires
 ARG
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Isabelino Gradín |  URU |
53.0 | ||
| 🥈 | José Pozzi | ARG |
— | ||
| 🥉 | Marcelo Uranga |  CHI |
— |
| Competition | 1918 South American Athletics Championships |
|---|---|
| Venue |
Buenos Aires
ARG
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Isabelino Gradín | URU |
53.0 | ||
| 🥈 | José Pozzi | ARG |
— | ||
| 🥉 | Marcelo Uranga | CHI |
— |