Career
Chun managed a career record of 100-6 during his amateur career. Results
1983 Boxing World Cup
1984 Summer Olympics
In 1986 Chun turned professional. He was the first South Korean Olympic medalist boxer to turn pro since 1968 Olympic bronze medalist Chang Kyou-chul.
After going 18-1, he was matched up against Joey Gamache for the WBA Lightweight title in Portland, Maine in 1992, but was defeated by 9 round TKO. After the bout, he retired from boxing.