Selvarajoo S/O Malayappan Krishnasamy (born December 15, 1952 in Singapore), better known as Rocky Selvarajoo, is a retired boxer from Singapore, who won the silver medal in the 1976 Asean Boxing Championships.
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.
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.
He retired as an undefeated national champion in six weight categories from 1975-1985.