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.
Michael Lee Moorer is an American former professional boxer who competed from 1988 to 2008. He won a world championship on four occasions in two weight classes, having held the WBO light heavyweight title from 1988 to 1991; compiling 22 straight KOs in 22 fights and the WBO heavyweight title from 1992 to 1993; the unified WBA, IBF and lineal heavyweight titles in 1994; and regained the IBF heavyweight title again from 1996 to 1997 becoming a three-time heavyweight world champion.
Boxing in the 1980s was filled with important fights, events and personalities that shaped the sport. Boxing in the 1980s was shaped by many different situations, such as the continuous corporate battles between the different world sanctioning organizations, the void left by Muhammad Ali as the sport's ambassador and consequent search for a new boxing hero, the continuous presence of Don King as the sport's most famous promoter, the surge of rival promoters as Bob Arum, Butch Lewis and Murad Muhammad, and major rule changes. In 1986, Mike Tyson emerged as a fresh new face in the heavyweight division, which had seen a decline in champion quality level after Ali's retirement and, later on, after longtime WBC ruler Larry Holmes' prime. In addition, the IBF and WBO began operating.
Virgil Eugene Hill is an American former professional boxer who competed from 1984 to 2007, and in 2015. He is a two-weight world champion, having held the WBA light heavyweight title twice, from 1987 to 1997; the IBF and lineal light heavyweight titles from 1996 to 1997; and the WBA cruiserweight title twice, from 2000 to 2002 and 2006 to 2007. As an amateur, Hill won a silver medal in the middleweight division at the 1984 Summer Olympics. In 2013, he was inducted into the International Boxing Hall of Fame.
Stephen Collins is an Irish former professional boxer who competed from 1986 to 1997. Known as the Celtic Warrior, Collins is the most successful male Irish boxer in recent professional boxing history, having held the WBO middleweight and super-middleweight titles simultaneously and never losing a fight as champion.
Light middleweight, also known as junior middleweight or super welterweight, is a weight class in boxing but also may include other combat sports.
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.
Patrizio Sumbu Kalambay is a Congolese-born Italian former professional boxer. A world champion and two-time title challenger, he held the WBA world middleweight title from 1987 until 1988.
Sven Ottke is a German former professional boxer who competed from 1997 to 2004. He was a unified super-middleweight world champion, having held the IBF title from 1998 to 2004, and the WBA (Unified) title from 2003 to 2004. With 21 successful title defences, Ottke was the fourth European boxer to retire as an undefeated world champion, after Jack McAuliffe, Terry Marsh, and Michael Loewe; Joe Calzaghe later became the fifth. Ottke defended the title against 20 boxers, a record in the super-middleweight division shared with Joe Calzaghe. As an amateur, Ottke won a bronze medal in the middleweight division at the 1989 World Championships.
Adnan Ćatić, known as Felix Sturm, is a Bosnian-German professional boxer. He has held multiple world championships in two weight classes, at middleweight and super-middleweight. As an amateur, he won a gold medal at the 2000 European Championships in the light-middleweight division.
Paolo Roberto is a Swedish ex-boxer of partial Italian descent.
Iran Barkley is an American former professional boxer who competed from 1982 to 1999. He held world championships in three weight classes, including the WBC middleweight title from 1988 to 1989, the IBF super middleweight title from 1992 to 1993, and the WBA light heavyweight title in 1992. As an amateur boxer, Barkley won a bronze medal in the middleweight division at the 1982 World Championships.
David Starie is a British former professional boxer who competed from 1994 to 2003. He challenged twice for world championships; the WBO super middleweight title in 2000 and the unified WBA (Super) and IBF super middleweight titles in 2003. At regional level, he held the British super middleweight title twice; first in 1997 and again from 1998 to 2001, and also held the Commonwealth super middleweight title from 1998 to 2002.
Roberto Garcia Cortez is a Mexican-American former professional boxer who competed from 1992 to 2001, and held the IBF junior lightweight title from 1998 to 1999. He has since worked as a boxing trainer, and was voted Trainer of the Year by The Ring magazine in 2011, and by the Boxing Writers Association of America in 2012. He is the older brother of professional boxer Mikey Garcia, who was a world champion in four weight classes.
Hassan N'Dam N'Jikam is a French Cameroonian professional boxer. He has held two middleweight world championships; including the WBO title in 2012 and the WBA (Regular) title in 2017, and has challenged once for a super-middleweight world title in 2019.
Bert Schenk was a German boxer.
Khoren Gevor is an Armenian-German professional boxer. He held the European middleweight title from 2008 to 2009, and challenged four times for a world title at middleweight and super-middleweight.
Giovanni De Carolis is an Italian professional boxer who held the WBA super-middleweight title in 2016.
Rick Thornberry is an Australian former professional boxer who competed from 1985 to 2002. He held the IBO super middleweight title in 1995 and challenged twice for major world championships; the WBO super middleweight title in 1999 and the IBF super middleweight title in 2002.
