  edwin "el chapo" rosario (; march 15, 1963 â december 1, 1997) was a puerto rican boxer. he won the lightweight championship three times, as the wbc lightweight champion (1983â84), and the wba champion (1986â87) and (1989â90). after moving up to the junior welterweight class, he won the wba championship, holding the title from 1991 to 1992. ==early life and career== edwin rosario was born in barrio candelaria, toa baja, an extremely poor barrio on the north coast of puerto rico. rosario's older brother papo became a professional boxer, with what looked like a promising career. his boxing manager and coach (trainer), manny siaca sr., had noticed the younger edwin rosario's talent when he was 8 years old. inspired by his brother papo, chapo rosario, as he became known in the world of boxing, had a stellar amateur boxing career. ==professional career== chapo's brother papo died unexpectedly, supposedly due to drugs, two years after his move to professional boxing. rosario persevered, wanting to honor his brother's memory by winning a world championship. he scored big knockout wins over young ezzard charles and edwin viruet, the former in three rounds on the holmes-cooney undercard. he eventually gained a record of 21-0 with 20 knockouts. this led to talks of a title fight against world boxing council (wbc) lightweight champion alexis argÃ¼ello, to be held in miami, but argÃ¼ello relinquished the title to move up in weight to challenge junior welterweight champion aaron pryor. ==boxing champion==  with arguello gone, rosario was matched with mexico's josÃ© luis ramÃ­rez on may 1, 1983 for the vacant wbc lightweight title. rosario dominated the first 7 rounds, but tired down the stretch to make for a very close fight. the judges, as well as most of the public present, felt rosario had done enough to win. he became world lightweight champion by the unanimous score of 115-113 on all 3 judging cards. rosario injured his hand during the fight and n
1963_births 1997_deaths International_Boxing_Hall_of_Fame_inductees People_from_Toa_Baja,_Puerto_Rico Puerto_Rican_boxers Puerto_Rican_sportspeople World_boxing_champions