On January 18, 1985, Ricardo made his professional debut at the age of 18 by scoring a third-round knockout of Rogelio Hernandez. He accumulated a record of 26–0 before receiving his first shot at a world title.
WBC mini flyweight champion On October 25, 1990, López defeated
WBC and
lineal mini flyweight champion
Hideyuki Ohashi of Japan via fifth-round
knockout to win his first world title. In 1991, he defeated Korean former champion
Kyung-Yung Lee (20–1) via Unanimous Decision. In 1992, he defended his title against
Pretty Boy Lucas (22–2–2) of the Philippines via Unanimous Decision and Rocky Lin (14–0) of Taiwan via TKO. López started 1993 with a stoppage victory over amateur standout
Kwang-Soo Oh and followed it with a knockout over future two-time champion
Saman Sorjaturong of Thailand. Sorjaturong was knocked down once in the first round and twice in the second round before the referee stopped the bout. Later that year, he knocked out
Filipino former champion
Manny Melchor in the eleventh round. In his tenth title defense, López defeated future champion
Kermin Guardia (21–0) by
unanimous decision. He knocked out Surachai Saengmorakot (10–0) in the first round of his next bout. In 1995, he defeated Andy Tabanas (30–2) of the Philippines via twelfth-round knockout. In his next bout, he defeated another Filipino boxer and founder of the famous "Ala Gym"
Ala Villamor (29–1–1) by knockout. In early 1997, there had been a plan in the works for López to move up in weight to challenge junior flyweight champion
Michael Carbajal, however, the plan was upended when Carbajal lost his title in an upset loss. López would go on to defend his title against Mongkol Charoen (20–1).
WBO and WBA mini flyweight champion In his 20th world title bout, López unified his WBC title by defeating
WBO mini flyweight champion Alex Sánchez (25–1) of Puerto Rico via fifth-round knockout. After López won the WBO title, he said he wanted to give his championship belt to his father, who is a boxing fan. His statement to Mexican newspapers prompted the organization to take away López' title and sanction a match between
Eric Jamili and
Mickey Cantwell to fill the vacancy. "It was enough for us," said the WBO president,
Francisco Valcarcel, of López' intention. "That's a public resignation."
Dwight Manley, López' agent, said López should have had a hearing before the WBO took away his title. "He got no letter, he got no telephone call," Manley said. On March 7, 1998, López fought undefeated
WBA mini flyweight champion Rosendo Álvarez to a
technical draw after referee
Arthur Mercante Sr. stopped the contest following an accidental clash of heads in the seventh round. This fight was part of undercard featured
Julio César Chávez vs.
Miguel Ángel González for the vacant WBC super lightweight title. In the rematch, Álvarez came in over the mini flyweight limit and was subsequently stripped of his title. Due to the weight disparity, the fight was in jeopardy. However, López chose to proceed with the contest against the heavier Álvarez with only López eligible to claim the now vacant WBA title. López defeated Álvarez by
split decision to claim his third mini flyweight title. After the fight, he vacated his titles in order to move up in weight.
IBF junior flyweight champion In his first bout at
junior flyweight, López defeated
IBF champion Will Grigsby of the U.S. by Unanimous Decision. He defended his title against former champion
Ratanapol Sor Vorapin by knocked out in the 3rd Round. On
September 29, 2001, López knocked out
Zolani Petelo in the eighth round, who had recently vacated his
IBF mini flyweight title, the only mini flyweight title that López had not claimed before moving up in weight. He officially announced his retirement from boxing at a press conference on November 27, 2002, in
Mexico City. This streak began with his knockout of Hideyuki Ohashi to win the WBC mini flyweight title in 1990 and ended with his knockout of Zolani Petelo to defend his IBF junior flyweight title in 2001. Ricardo only had one draw, which came in his 48th bout against
Rosendo Álvarez in 1998 and was then avenged in their rematch eight months later. His final record was 51 wins (38 knockouts), 0 losses, and 1 draw. == Life after boxing ==