| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Jung Jun "Mark"•Chay |
| Used name | Mark•Chay |
| Born | 18 February 1982 in Singapore, Singapore (SGP) |
| Measurements | 176 cm / 78 kg |
| Affiliations | BYU Cougars, Provo (USA) |
| NOC | Singapore |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 2000 Summer Olympics | Swimming (Aquatics) | SGP |
Mark Chay | |||
| 100 metres Freestyle, Men (Olympic) | =47 | |||||
| 200 metres Freestyle, Men (Olympic) | 23 | |||||
| 2004 Summer Olympics | Swimming (Aquatics) | SGP |
Mark Chay | |||
| 100 metres Freestyle, Men (Olympic) | 56 | |||||
| 200 metres Freestyle, Men (Olympic) | 51 |