The World Boxing Organization (WBO) is an organization which sanctions professional boxing bouts. It is recognized by the International Boxing Hall of Fame (IBHOF) as one of the four major world championship groups, alongside the World Boxing Association (WBA), World Boxing Council (WBC), and International Boxing Federation (IBF). The WBO's headquarters are located in San Juan, Puerto Rico.
Emanuel "Manny" Steward was an American boxer, trainer, and commentator for HBO Boxing. He was also called the Godfather of Detroit Boxing. Steward trained 41 world champion fighters throughout his career, most notably Thomas Hearns, through the famous Kronk Gym and later heavyweights Lennox Lewis and Wladimir Klitschko. Emanuel trained over two dozen boxers who turned out to be champions in the course of his career. His heavyweight fighters had a combined record of 34–2–1 in title fights. He was an inducted of the International Boxing Hall Of Fame, and the World Boxing Hall of Fame. Steward was also known for his charity work in Detroit, Michigan, helping youth to attain an education.
Carlos Zárate Serna is a Mexican former professional boxer who competed from 1970 to 1988, and held the WBC bantamweight title from 1976 to 1979.
Evander Holyfield is an American former professional boxer who competed between 1984 and 2011. He reigned as the undisputed champion at cruiserweight in the late 1980s and at heavyweight in the early 1990s, and is the only boxer in history to win the undisputed championship in two weight classes in the three belt era. Nicknamed "the Real Deal", Holyfield is the only four-time world heavyweight champion, having held the unified WBA, WBC, and IBF titles from 1990 to 1992, the WBA and IBF titles again from 1993 to 1994, the WBA title a third time from 1996 to 1999; the IBF title a third time from 1997 to 1999 and the WBA title for a fourth time from 2000 to 2001.
Robert James Fitzsimmons was a British professional boxer who was the sport's first three-division world champion. He also achieved fame for beating Gentleman Jim Corbett, and he is in The Guinness Book of World Records as the lightest heavyweight champion, weighing just 167 pounds when he won the title. Nicknamed Ruby Robert and The Freckled Wonder, he took pride in his lack of scars and appeared in the ring wearing heavy woollen underwear to conceal the disparity between his trunk and leg-development.
Heavyweight is a weight class in combat sports and professional wrestling.
Welterweight is a weight class in combat sports. Originally the term "welterweight" was used only in boxing, but other combat sports like Muay Thai, taekwondo, and mixed martial arts also use it for their own weight division system to classify the opponents. In most sports that use it, welterweight is heavier than lightweight but lighter than middleweight.
In boxing, the undisputed champion of a weight class is the boxer who simultaneously holds world titles from all recognized major organisations by each other and the International Boxing Hall of Fame. There are currently four major sanctioning bodies: WBA, WBC, IBF and WBO. There were many undisputed champions before the number of major sanctioning bodies recognizing each other increased to four in 2007, but there have only been 18 boxers to hold all four titles simultaneously.
Jeffrey Scott Lacy is an American former professional boxer who competed from 2001 to 2015. He held the IBF super middleweight title from 2004 to 2006, and the IBO super middleweight title from 2005 to 2006. Lacy rose to prominence in the early to mid-2000s as a feared puncher in the division, with his physique and knockout record making him one of boxing's top-rated prospects at the time.
Professional boxing, or prizefighting, is regulated, sanctioned boxing. Professional boxing bouts are fought for a purse that is divided between the boxers as determined by contract. Most professional fights are supervised by a regulatory authority to guarantee the fighters' safety. Most high-profile bouts obtain the endorsement of a sanctioning body, which awards championship belts, establishes rules, and assigns its own judges and referees.
Amateur boxing is a variant of boxing practiced at the collegiate level, at the Olympic Games, Pan American Games and Commonwealth Games, as well as many associations.
Frederick Steven Roach is an American boxing trainer and former professional boxer. Roach is widely regarded as one of the best boxing trainers of all time. He is the enduring boxing coach of the eight-division world champion Manny Pacquiao, five-time and four-division world champion Miguel Cotto, former WBC middleweight champion Julio César Chávez Jr., three-time world champion James Toney, former UFC middleweight and three-time welterweight champion Georges St-Pierre, as well as top prospects Jose Benavidez, Peter Quillin, and Vanes Martirosyan. Roach was the trainer of two-time women's world champion Lucia Rijker. He has also trained former light welterweight champion Amir Khan.
Hercules Kyvelos is a Canadian boxer in the Welterweight division and is the former Canadian Welterweight Champion. He fought at the 1996 Summer Olympics in Atlanta, Georgia.
The International Boxing Association (IBA), previously known as the Association Internationale de Boxe Amateur (AIBA), is an international sports organization that sanctions amateur (Olympic-style) boxing matches and awards world and subordinate championships. IBA consists of five continental confederations: AFBC, AMBC, ASBC, EUBC, and OCBC. The association includes 203 national boxing federations.
Fitzroy "Fitz the Whip" Vanderpool is one of Canada's most decorated professional champions holding 6 title belts. Born November 3, 1967, in Trinidad and Tobago, he's a Canadian professional boxer who held the Canada Boxing Authority (NBA) Middleweight title. Known as Fitz The Whip Vanderpool, he moved to Canada at the age of six with his family. Coming from a family of five boys who were all boxers, life was always competitive in the Vanderpool household. This gave Vanderpool the hope, dream and drive to become a professional world boxing champion.
Vasiliy Anatolyevich Lomachenko, also spelled Vasyl Anatoliyovych Lomachenko is a Ukrainian professional boxer. He has held multiple world championships in three weight classes from featherweight to lightweight, including unified and lineal titles at lightweight.
In boxing, a weight class is a measurement weight range for boxers. The lower limit of a weight class is equal to the upper weight limit of the class below it. The top class, with no upper limit, is called heavyweight in professional boxing and super heavyweight in amateur boxing. A boxing match is usually scheduled for a fixed weight class, and each boxer's weight must not exceed the upper limit. Although professional boxers may fight above their weight class, an amateur boxer's weight must not fall below the lower limit. A nonstandard weight limit is called a catchweight.
Javier Francisco Méndez Torres is a Mexican professional boxer in the Welterweight division. He's also the former Sinaloa State Welterweight and the WBC FECARBOX Welterweight Champion.
Alejandro Berrio 
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