Jaegal Sung-yeol
| full name | Jaegal Sung-yeol | |
| nationality | South Korea (KOR) | |
| local spelling | 제갈 성렬 | |
| born | March 1970 | in Kyungkido (South Korea) |
| Navigation | Championships | World Cup |
Championships - Medal table and top 10 positions
| kampioenschap | gold | silver | bronze | 4th-6th | 7th-10th | starts |
 Olympic Games | 0 | 0 | 0 | 0 | 0 | 6 |
| WCh Single Distances | 0 | 0 | 1 | 1 | 1 | 4 |
| WCh Sprint | 0 | 0 | 0 | 2 | 0 | 7 |
Championships - Results
| year | position | championship | place | |
| 1990 | 22 | WCh Sprint | Tromsø | NOR |
| 1991 | 14 | WCh Sprint | Inzell | GER |
| 1992 | 12 | Olympic Games 500 meters | Albertville | FRA |
| 26 | Olympic Games 1000 meters | Albertville | FRA | |
| 1993 | 18 | WCh Sprint | Ikaho | JPN |
| 1994 | 30 | Olympic Games 500 meters | Lillehammer | NOR |
| 39 | Olympic Games 1000 meters | Lillehammer | NOR | |
| 1995 | 12 | WCh Sprint | Milwaukee | USA |
| 1996 | 5 | WCh Single Distances 2x500 meters | Hamar | NOR |
3  | WCh Single Distances 1000 meters | Hamar | NOR | |
| 4 | WCh Sprint | Heerenveen | NED | |
| 1997 | DNS2 | WCh Single Distances 2x500 meters | Warsaw | POL |
| 9 | WCh Single Distances 1000 meters | Warsaw | POL | |
| 5 | WCh Sprint | Hamar | NOR | |
| 1998 | 16 | Olympic Games 2x500 meters | Nagano | JPN |
| 30 | Olympic Games 1000 meters | Nagano | JPN | |
| 28 | WCh Sprint | Berlin | GER | |
