At the age of 17, former boxer Celso Danggod brought him to Manila to join Dante Almario's boxing stable. He was eventually led to Gabriel "Bebot" Elorde's boxing stable and continued his boxing career under his stable. Lopez made his professional debut on October 13, 2006, against fellow Filipino Joey Balmes. The bout took place in
Trece Martires,
Cavite and he won via a unanimous decision. Three years later, he won the vacant WBC International Super Flyweight title on April 5, 2009, by beating Korean Jong-Nam Park via a technical knockout in the 8th round. Park went down three times in the opening round and was floored once in the 8th round, which prompted the stoppage. The fight took place in the
Ynares Sports Arena in
Pasig. Lopez successfully defended his belt against Japanese Katsumi Makiyama and Thai
Wandee Singwangcha on November 28, 2009, and July 31, 2010, respectively. Both bouts happened in Pasig. On October 2, 2010, he lost via 5th round technical decision over
Juan José Montes for Montes' WBC Youth World Super Flyweight belt. This fight also was a WBC Super Flyweight title eliminator, where the winner will challenge the world title then held by
Tomás Rojas. A rematch was negotiated in the WBC convention but was not granted. On September 24, 2011, he stopped Mexican Oscar "Ceviche" Ibarra to successfully capture the WBC Silver Super Flyweight belt at the Plaza De Toros in
Querétaro,
Mexico. This fight made him the
mandatory challenger for the WBC Super Flyweight title which had been succeeded by
Suriyan Sor Rungvisai at that time. While Lopez had been the WBC's top contender in his division for about two years the title has been moved twice. Lopez's promoter Gabriel Elorde Jr. stated that Lopez should have been given the world title shot against any of those three champions and insisted that "Now it's our turn. Lopez is next. No more delays." mentioning that he hopes that Sato would face Lopez in his first defense after three months. Lopez's long-awaited first world title shot was decided to take place against Sato at the
Yokohama Cultural Gymnasium on July 8, 2012. == Professional boxing record ==