| Medal record | ||
|---|---|---|
| Sailing | ||
| Representing |
||
| Olympic Games | ||
| 1920 Antwerp | 6 metre (1919 rating) | |
John Klotz was a Belgian sailor who won the Silver medal in 6 metre class (1919 rating) in the 1920 Summer Olympics in Antwerp along with Léon Huybrechts and Charles van den Bussche.