Full name
Jung-Koo Chang

Date of birth
February 4, 1963

Debut
On November 17, 1980, in Seoul, he knocked out Jung-Yul Suh in three rounds.

Won The World Title
On March 26, 1983, in Daejon, South Korea, he knocked out Panamanian Hilario Zapata in three rounds and won the World Boxing Council light flyweight title.

Lost His Title
In his defense 16! On December 9, 1989, in Daegu, South Korea, the Mexican Humberto"Chiquita"González defeated him by unanimous decision.

Withdrawal
On May 18, 1999, in Seoul, Muangchai Kittikasem knocked him out in 12 rounds when he disputed the WBC flyweight title.

The Data
Jung-koo Chang was the executioner of the Mexicans Germán Torres, Jorge Cano, Efrén Pinto, Francisco Montiel, Isidro Pérez and Armando Velasco when they disputed the world title, until he was stopped by"La Chiquita"González