Professional American boxer David Diaz has an estimated net worth of $15 million in 2012.

David Diaz's professional boxing career debuted in 1996 when he won against Marcos Antonio Rodriguez of the U.S.A. He was able to sustain a 26-winning match before he lost to Kendall Holt via eight round technical knockout. His last boxing match took place in 2011 against Henry Lundy of the U.S.A. where he once again lost. Throughout his entire professional boxing career, David Diaz had a bout with renowned boxers like Humberto Soto, Robert Frankel, Erik Morales, Jesus Chavez, and of course, Manny Pacquiao. On August 4, 2007, David Diaz won against Erik Morales via controversial unanimous decision which enabled him to defend his title. Almost a year later, Manny Pacquiao stripped him off his title when he won via ninth-round knockout in Las Vegas. This led Pacquiao to win his fifth world championship in five various weight divisions.

David Diaz is a four-time winner of Chicago Golden Gloves and a three-time winner of National Golden Gloves ( 993, 1994 and 1996).