Career
He competed at the 2004 Summer Olympics, but was knocked off in the round of 16 by Hong Moo-Won of South of Korea. He qualified for the Athens Games by ending up in second place in the 2nd AIBA Asian 2004 Olympic Qualifying Tournament in Karachi, Pakistan, behind Hong Moo-Won. At the 2007 World Amateur Boxing Championships in Chicago he defeated local hero Luis Yanez but lost to favorite Zou Shiming in the final.
Tañamor competed in the 2008 Summer Olympics in Beijing, entering in the light flyweight class.
However, he was defeated by Manyo Plange of Ghana in the Round of 32, 6 to 3.