 
| Roles | Competed in Olympic Games • Referee | 
|---|---|
| Sex | Male | 
| Full name | Jegar•Seong-Ryeol | 
| Used name | Jegar•Seong-Ryeol | 
| Name order | Oriental | 
| Original name | 제갈•성렬 | 
| Other names | Jaegal Sung-Yeol | 
| Born | 24 March 1970 in ?, Gyeongsangbuk (KOR) | 
| Measurements | 173 cm / 70 kg | 
| Affiliations | Kyungki-Do | 
| NOC |  Republic of Korea | 
Personal Bests: 500 – 35.74 (1999); 1000 – 1:11.16 (2000); 1500 – 2:01.13 (1990); 5000 – 7:31.62 (1989); 10000 – 17:17.33 (1987).
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1992 Winter Olympics | Speed Skating (Skating) |  KOR | Jegar Seong-Ryeol | |||
| 500 metres, Men (Olympic) | 12 | |||||
| 1,000 metres, Men (Olympic) | =26 | |||||
| 1994 Winter Olympics | Speed Skating (Skating) |  KOR | Jegar Seong-Ryeol | |||
| 500 metres, Men (Olympic) | 30 | |||||
| 1,000 metres, Men (Olympic) | 39 | |||||
| 1998 Winter Olympics | Speed Skating (Skating) |  KOR | Jegar Seong-Ryeol | |||
| 500 metres, Men (Olympic) | =16 | |||||
| 1,000 metres, Men (Olympic) | 30 | 
| Games | Sport (Discipline) / Event | NOC / Team | Phase | Unit | Role | As | |
|---|---|---|---|---|---|---|---|
| 2012 Winter Youth Olympics | Speed Skating (Skating) |  KOR | Jegar Seong-Ryeol | ||||
| 500 metres, Girls (YOG) | Race #1 | Starter | |||||
| 500 metres, Girls (YOG) | Race #2 | Starter | |||||
| 1,500 metres, Girls (YOG) | Final Standings | Starter | |||||
| 3,000 metres, Girls (YOG) | Final Standings | Starter | |||||
| Mass Start, Girls (YOG) | Final Standings | Starter |