The International Boxing Organization (IBO) is a US based corporation that sanctions professional boxing matches and awards world and regional championships.
Lester Ellis is a British-born Australian former professional boxer. He is a five-time world champion, having also held the Australian and Commonwealth (twice) titles.
Jawaid Khaliq, MBE, is a British former professional boxer who competed from 1997 to 2004. A dual Pakistan national, he became the first British Asian boxing world champion, winning the lightly-regarded IBO welterweight title in 2001 and defending it seven times before retiring three years later. He also held multiple regional championships, including the Commonwealth welterweight title in 2000.
Steve Larrimore is a Bahamian former professional boxer who competed from 1984 to 2001. As an amateur, he competed at the 1979 Pan American Games, 1982 Central American and Caribbean Games, 1982 Commonwealth Games, the 1983 Pan American Games and at the 1984 Summer Olympics in Los Angeles, losing to eventual bronze medal winner Mirko Puzović of Yugoslavia, and as a professional won the World Boxing Council (WBC) Continental Americas lightweight title, and Commonwealth light welterweight title, and was a challenger for the United States Boxing Association (USBA) lightweight title against Freddie Pendleton, International Boxing Organization (IBO) light welterweight title against Israel Cardona, and National Boxing Association (NBA) Junior Middleweight Title against Hasan Al, his professional fighting weight varied from lightweight to light middleweight.
Andre Thysse was a South African professional super middle/light heavyweight boxer of the 1990s and 2000s.
Sylvester "The Master Blaster" Mittee is a Saint Lucian-British boxer of the 1970s and 1980s. He fought as an amateur lightweight and a professional light welterweight/welterweight/light middleweight, winning multiple championships.
Bernard "Punching Postman" Paul is a Mauritian/British professional light welter/welter/light middleweight boxer of the 1990s and 2000s who won the British Boxing Board of Control (BBBofC) Southern (England) Area light welterweight title, and Commonwealth light welterweight title, and was a challenger for the World Boxing Organization (WBO) Inter-Continental light welterweight title against Jon Thaxton, British Boxing Board of Control (BBBofC) British light welterweight title against Mark Winters, and World Boxing Organization (WBO) Inter-Continental light welterweight title against Ricky Hatton, his professional fighting weight varied from 138 lb, i.e. light welterweight to 149+1⁄4 lb, i.e. light middleweight.
Tony Laing is a Jamaican/British professional light welter/welter/light middleweight boxer of the 1970s and '80s who won the British Boxing Board of Control (BBBofC) Midlands (England) Area light welterweight title, BBBofC British light welterweight title, Commonwealth light welterweight title, and was a challenger for the European Boxing Union (EBU) light welterweight title against Tusikoleta Nkalankete, his professional fighting weight varied from 137+1⁄4 lb, i.e. light welterweight to 149 lb, i.e. light middleweight.
Donovan Boucher is a Jamaican/Canadian professional welter/light middle/middle/super middleweight boxer of the 1980s, '90s and 2000s who won the Canada welterweight title, and Commonwealth welterweight title, and was a challenger for World Boxing Association (WBA) Inter-Continental welterweight title against Glenwood Brown, World Boxing Association (WBA) World welterweight title against Crisanto España, and Canada light middleweight title against Gareth Sutherland, his professional fighting weight varied from 144 lb, i.e. welterweight to 161 lb, i.e. super middleweight.
Ossie "The Ghanaian Gladiator" Duran is a Ghanaian professional boxer, whose career has spanned over 3 decades (1990's/2000's/2010's).
Jeff "Flash" Malcolm, is an Australian professional boxer who fought from 1971 until 2002. He won the Australian light welterweight title, New South Wales (Australia) State lightweight title, Australasian light welterweight title, South Pacific light welterweight title, Queensland (Australia) State welterweight title, International Boxing Council (IBC) welterweight title, South Pacific welterweight title, World Boxing Federation (WBF) Intercontinental welterweight title, WBF welterweight title, Pan Asian Boxing Association (PABA) welterweight title, World Boxing Association (WBA) Fedelatin welterweight title, PABA light middleweight title, and Commonwealth light welterweight title. He was also a challenger for the South Seas light welterweight title against Pat Leglise, Australian welterweight title against Wilf Gentzen, and World Boxing Organization (WBO) welterweight title against Manning Galloway. His professional fighting weight varied from 135 lb, i.e. lightweight to 165+1⁄4 lb, i.e. super middleweight. He was inducted into the Australian National Boxing Hall of Fame in 2007.
Lawrence "Baby Casius" Austin is an Australian professional super feather/light/light welter/welter/light middle/middleweight boxer of the 1970s and '80s who won the West Australia State welterweight title, West Australia State light middleweight title, Victoria State light middleweight title, Australian lightweight title, Australian light welterweight title, Australian welterweight title, South Seas Light Middleweight Title, and Commonwealth light welterweight title (twice), and was a challenger for the Australian light middleweight title against Russell Sands, and Commonwealth light welterweight title against Jeff Malcolm, his professional fighting weight varied from 128 lb, i.e. super featherweight to 159 lb, i.e. middleweight. He was inducted into the Australian National Boxing Hall of Fame in 2008.
Kevin "Bones" Kelly is an Australian retired professional welter/light middle/middleweight boxer of the 1990s and 2000s who won the South Australia State welterweight title, New South Wales (Australia) State welterweight title, New South Wales (Australia) State light middleweight title, Australian light middleweight title, Pan Asian Boxing Association (PABA) light middleweight title, World Boxing Union (WBU) middleweight title, and Commonwealth light middleweight title (twice), and was a challenger for the World Boxing Association (WBA) World light middleweight title against David Reid, and World Boxing Organization (WBO) Inter-Continental light middleweight title against Gary Lockett, his professional fighting weight varied from 142 lb, i.e. welterweight to 158+1⁄4 lb, i.e. middleweight.
Kevin "Bulldog" Bennett is an English professional light/light welter/welter/light middleweight boxer of the 1990s and 2000s, who as an amateur won the 1999 Amateur Boxing Association of England light welterweight (64 kg) title, against Daniel Happe, boxing out of Hartlepool Boys ABC, and as a professional won the Commonwealth lightweight title, and was a challenger for the International Boxing Organization (IBO) lightweight title against Jason Cook, and British Boxing Board of Control (BBBofC) lightweight title against Graham Earl, his professional fighting weight varied from 134 lb, i.e. lightweight to 150 lb, i.e. light middleweight.
Steve "The Viking" Foster is a retired English professional boxer of the 1980s and '90s who won the Commonwealth light middleweight title and IBF Inter-Continental light middleweight title, and was a challenger for the World Boxing Association (WBA) Inter-Continental light middleweight title against Shaun Cummins, BBBofC British light middleweight title against Robert McCracken, International Boxing Federation (IBF) Inter-Continental light middleweight title against Bahre Ahmeti, World Boxing Organization (WBO) light middleweight title against Ronald "Winky" Wright, BBBofC British middleweight title against Howard Eastman, World Boxing Federation (WBF) middleweight title against Cornelius Carr, and International Boxing Organization (IBO) middleweight title against Mpush Makambi, his professional fighting weight varied from 146 lb, i.e. welterweight to 167 lb, i.e. super middleweight.
Richard "The Secret" Williams is an English professional light middle/middle/super middleweight boxer of the 1990s, 2000s and 2010s who won the International Boxing Organization (IBO) light middleweight title, and Commonwealth light middleweight title (twice), and was a challenger for the International Boxing Organization (IBO) light middleweight title against Sergio Gabriel Martinez, and British Boxing Board of Control (BBBofC) British middleweight title against Howard Eastman, his professional fighting weight varied from 149+3⁄4 lb, i.e. light middleweight to 162+1⁄4 lb, i.e. super middleweight. Richard Williams is trained by Brian Lawrence, and managed by Barry Hearn, and John Rooney.
Michael "Mickey" Hughes is a former English boxer. He competed at welterweight and professional welter/light-middleweight boxer levels and was mostly active in the 1980s and 1990s.
Jason Welborn is an English professional boxer who challenged once for the unified WBA (Super), IBF and IBO light-middleweight titles in 2018. At national level, he held the British middleweight title in 2018, and challenged for the British welterweight and light middleweight titles in 2013 and 2014 respectively, and the Commonwealth light-middleweight and middleweight titles in 2019 and 2020 respectively.
Kris Andrews
Verno Phillips 
Wayne Harris
Richard Williams 
Gilberto Flores
Sala Sporturilor Olympia, Ploiești, Romania
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Paulo Alejandro Sanchez
Gavin Topp
Manny Sobral 
Greg Johnson
Fitz Vanderpool 
Phil Clarson