Diaz began his acting career in 1984. In 1988, he became a talent of
Viva Films, where he initially starred in teen comedy films, such as
Estudyante Blues (1989) and ''Teacher's Enemy No. 1
(1990). He also had a special role in the 1988 film Boy Negro'' as the young titular character, in which he won as Best Child Performer in the
7th FAP Awards.
basketball tournament In 1992, he was launched under Viva's action stable through
Angelito San Miguel at ang Mga Batang City Jail and since bagged either co-lead or supporting roles in various action films, such as
Blue Jeans Gang (1992),
Pita (1993) and
Brat Pack (1994). In 1995, he was launched into stardom with the biopic
The Grepor Butch Belgica Story, where he portrayed the titular character. Since then, he became among the country's action stars at that time, bagging mostly lead roles in various action films, such as
Masamang Damo (1996),
Anak ni Boy Negro (1997),
Squala (1998) and
Sugo ng Tondo (2000). Since 2009, he bags supporting roles in various TV series, notably villain roles. Jeric Raval and Diaz, as one of the
villains will be part of
The Guardian (2024 film). ==Personal life==