The World Boxing Council (WBC) is an international professional boxing organization. It is among the four major organizations which sanction professional boxing bouts, alongside the World Boxing Association (WBA), International Boxing Federation (IBF) and World Boxing Organization (WBO).
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.
The International Boxing Federation (IBF) is one of four major organizations recognized by the International Boxing Hall of Fame (IBHOF) which sanctions professional boxing bouts. The others are the World Boxing Association (WBA), World Boxing Council (WBC) and World Boxing Organization (WBO).
The European Boxing Union (EBU), formerly known as the International Boxing Union (IBU), is a pan-European governing body that sanctions championship bouts in professional boxing. The EBU governs the most-prestigious continental title in Europe, the EBU European Championship, in addition to their EBU EU Championship for competitors from within the European Union and the EBU EE Championship for those outside the European Union. It is a federation affiliated with the World Boxing Council (WBC).
In boxing, the undisputed champion of a weight class is the boxer who simultaneously holds world titles from all major organizations recognized by each other and the International Boxing Hall of Fame. There are currently four major sanctioning bodies: WBA, WBC, WBO, and IBF. There were many undisputed champions before the number of major sanctioning bodies recognizing each other increased to four in 2007, but there have been only 19 boxers to hold all four titles simultaneously.
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.
Steve "Stevie" Cruz is a retired American professional boxer who became the WBA World Featherweight Champion on June 23, 1986. His trainer for much of his career was Don Gorman.
Nonito Gonzales Donaire Jr. is a Filipino American professional boxer. He has held multiple world championships in four weight classes from flyweight to featherweight, and is the oldest boxer in history to win a bantamweight world title, as well as being the first three-time champion in that weight class. Donaire has also held world championships in three consecutive decades: the 2000s, 2010s and 2020s, being the sixth boxer to do so after Evander Holyfield, Manny Pacquiao, Bernard Hopkins, Erik Morales, and Floyd Mayweather Jr.
The Oriental and Pacific Boxing Federation (OPBF) is a professional boxing organization that sanctions title fights in the Asian and Pacific region.
The Asian Boxing Council (ABCO) is a professional boxing organization that sanctions title fights in the Greater Asian region.
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.
Adrián Hernández is a Mexican former professional boxer who competed from 2006 to 2015. He is a two-time world champion, having held the WBC light flyweight title twice between 2011 and 2014.
Denis Alexandrovich Grachev is a Russian boxer, kickboxer, and mixed martial artist residing in the United States. Grachev was the IKF Muay Thai world light cruiserweight champion.
Joey Olivo is an American former professional boxer of Mexican descent who competed from 1976 to 1989. He held the WBA world light flyweight title in 1985 and challenged for the WBC world light flyweight title in 1981. At regional level he held the WBC-NABF light flyweight title in 1983; the IBF-USBA flyweight title in 1984; and the WBC-NABF flyweight title in 1988.
Miguel Angel Herrera
Jade Bornea 
Isaac Dogboe 
Floyd Schofield 
Ermal Hadribeaj 
Shakeel Phinn