| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Johannes Theodorus Petrus Maria "John"•Klotz | |
| Used name | John•Klotz | |
| Born | 21 November 1892 in Antwerpen (Antwerp), Antwerpen |  BEL |
| Affiliations | RYCB — Antwerpen (Antwerp), Antwerpen | BEL |
| NOC | Belgium | BEL |
| Medals | OG |
| Gold | 0 |
| Silver | 1 |
| Bronze | 0 |
| Total | 1 |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1920 Summer Olympics | Sailing | BEL |
John Klotz | |||
| Three-Person Keelboat, Open (Olympic) | Tan-Fe-Pah | 2 | Silver | |||
| 1924 Summer Olympics | Sailing | BEL |
John Klotz | |||
| Three-Person Keelboat, Open (Olympic) | Ciss | =5 |
