Rocky fought world champion and Montreal Olympic gold medalist Gu Yong-ju in 1977, but the fight had to be stopped after he received a cut to his eye.

In the 1978 Bangkok King's Cup, he beat 1979 Sea Games gold medalist Johnny Elorde by technical knockout.

[1] In 1985, Rocky took part in the 1985 Southeast Asian Games in the light middleweight category.

[2] In 1991, at 38, he knocked out 1985 Sea Games silver medalist Thaweewat Islam, who was then 23, in the first round of a demonstration.

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