| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Joris Gerhard•Keizer | |
| Used name | Joris•Keizer | |
| Born | 26 January 1979 in Hengelo, Overijssel |  NED |
| Measurements | 185 cm / 73 kg | |
| Affiliations | De Dolfijn SPAX, Amsterdam | |
| NOC | Netherlands | NED |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 2000 Summer Olympics | Swimming (Aquatics) | NED |
Joris Keizer | |||
| 100 metres Butterfly, Men (Olympic) | 9 | |||||
| 4 × 100 metres Medley Relay, Men (Olympic) | Netherlands | 4 | ||||
| 2004 Summer Olympics | Swimming (Aquatics) | NED |
Joris Keizer | |||
| 100 metres Butterfly, Men (Olympic) | 19 |
