| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Yu•Jae-Seong | |
| Used name | Yu•Jae-Seong | |
| Name order | Oriental | |
| Original name | 유•재성 | |
| Other names | Yoo Jae-Song | |
| Born | 20 February 1960 | |
| Measurements | 169 cm / 59 kg | |
| NOC | Republic of Korea |  KOR |
Personal Best: Mar – 2-12:49 (1988).
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1988 Summer Olympics | Athletics | KOR |
Yu Jae-Seong | |||
| Marathon, Men (Olympic) | 31 |
