1976-08-01 Rigoberto Riasco w pts 15 (15) Dong-Kyun Yum, The Stadium, Pusan, South Korea - WBC
1976-08-01 Rigoberto Riasco w pts 15 (15) Dong-Kyun Yum, The Stadium, Pusan, South Korea - WBC. Referee: Larry Rozadilla. Scorecards: 145-143, 147-143, 143-150. Making good use of a stinging left hand and using the ring well, Yum (121½) made a decent start before the taller Riasco (120) came back strongly to get into the fight. With the action hotting up, the last three rounds became a no-quarter given affair and left both men exhausted.
Initially announced as a split decision win for Riasco, 25 minutes later the referee explained that he had found a mistake in his tally and that Yum was the winner and new champion. The WBC confirmed Yum as champion, but following a further statement from the referee that he had been physically forced to change the decision Riasco was eventually reinstated.