|Full name||오 광수|
|Born||October 30, 1965|
|Height||1.67 m (5 ft 5 1⁄2 in)|
|Weight||48 kg (106 lb)|
|Weight class||Light Flyweight|
In 1986, Oh won the bronze medal at the World Amateur Boxing Championships. In the preliminary bout, he beat Róbert Isaszegi, who won bronze at the 1988 Olympics, by RSC, scoring three knockdowns in the first round.
Oh competed at the 1988 Summer Olympics where he was a favorite to medal, however, he was eliminated in his first bout by a narrow 3–2 decision against eventual silver medalist and future hall of fame champion Michael Carbajal. Oh had defeated Carbajal by a 3-0 margin in a previous meeting.
|1985 Boxing World Cup|
|Light Flyweight||Quarterfinal||Win||Marcelino Bolivar||4-1|
|1986 World Championships|
|Light Flyweight||First||Win||Robert Isaszegi||RSC 1|
|Semifinal||Loss||Luis Roman Rolon||1-4|
|1988 Summer Olympics|
In February 1990, Oh made his pro debut in minimumweight, and after only six fights challenged Ricardo Lopez for the WBC minimumweight title on January 31, 1993. However, he was TKO'd in the 9th round. Oh had struggled to make weight to minimumweight, and eventually retired after the bout with a record of 6-1-0 without moving up a weight class.
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