Poverty, however, compelled the Cebuano southpaw, a father of three, to venture into the pro arena, hoping to earn considerable money to sustain the daily living of his family. They were then monickered as "The Golden Boys of Cebu Boxing". The following year, he lost that titles to Pongsaklek Wonjongkam him via a TKO in the 1st round.
He lost to Shinsuke Yamanaka via knockout in the twelfth round with the WBC Bantamweight title on the line on April 8, 2013.
A former WBC flyweight champion. Tuñacao was a several time national champion in the amateur ranks while he was still under the careful watch of the eminent American Library Association Boxing Club. On August 1, 1998, Tuñacao, known as "Eagle Eye", officially turned pro along with current WBC ranked #5 and then Filipino super featherweight champion Randy Suico and OPBF welterweight king Rev Santillan. Tuñacao wrested the Filipino flyweight crown with a 12-round unanimous decision win over Rio Sumampong on September 25, 1998 in Talisay City. In 2000, became the Lineal and WBC flyweight champion with a 7th round TKO win over Medgoen Singsurat.
