Chris Cornelius Byrd (born August 15, 1970) is a retired professional boxer. He is the former WBO and IBF heavyweight champion. His nickname is "Rapid Fire".

Chris Byrd was the youngest of eight children growing up in Flint, Michigan. He began boxing at age 5, training in his father (Joe Sr.)'s Joe Byrd Boxing Academy. His father continued to train and manage Byrd as a professional. Byrd attended Flint Northwestern High School.

Byrd began competing in the ring at age 10, and compiled an impressive 275 wins in the amateur ranks. He was a three-time U.S. amateur champion (1989, 1991, and 1992). He was on the 1991 U.S. National boxing Team that became the first (and only) U.S. team to score a tie against the heralded Cuban team. Byrd won the silver medal in the 1992 Barcelona summer Olympics as a middleweight, losing to Cuba's Ariel Hernández in the final.

Byrd turned professional on January 28, 1993, knocking out 10 of his first 13 opponents. Byrd moved up to heavyweight three fights into his professional career.

Wladimir Klitschko (Ukrainian: Володи́мир Володи́мирович Кличко́ [transliteration: Volodymyr Volodymyrovych Klychko], born 25 March 1976) is a Ukrainian heavyweight professional boxer. Klitschko is the WBA (Super), IBF, WBO, IBO & The Ring Heavyweight Champion. His older brother Vitali Klitschko is the current WBC Heavyweight Champion. Klitschko is the longest reigning Heavyweight Champion in history for the IBF, WBO & IBO Heavyweight titles, both in measurements of defenses and time & overall the 6th longest reigning Heavyweight Champion of all time. As of 2011, Boxrec rates Klitschko as the number 2 pound-for-pound in the world. Ring Magazine currently rates Klitschko as the number six pound-for-pound boxer in the world.

Since 2005, Klitschko has been the dominant force in the heavyweight division, defeating a majority of the top heavyweights in the rankings. When Klitschko won the IBF title against Chris Byrd there were four separate Heavyweight Champions. Since then, he has unified the IBF, IBO, WBO & WBA belts and defeated the WBA Champion in recess. Following his win over Ruslan Chagaev, Klitschko was awarded the vacant Ring Magazine Heavyweight title.

Vitali Klitschko (Ukrainian: Віта́лій Володи́мирович Кличко́ [transliteration: Vitali Volodymyrovych Klychko], [ʋiˈtɑʎiɪ̯ klɪtʃˈkɔ]; English: /vɨˈtæli ˈklɪtʃkoʊ/; born 19 July 1971) is a Ukrainian professional boxer and the reigning WBC Heavyweight Champion. He is a leader of the political party UDAR of Vitaliy Klychko and a member of the Ukrainian delegation to the Congress of the Council of Europe. He previously held the WBO and WBC titles. Klitschko is the first professional boxing world champion to hold a Ph.D. degree.

Klitschko is known for his powerful punches and durable chin. With a 86.96% knockout percentage rate, he holds the second best knockout-to-fight ratio of any champion in heavyweight boxing history, after Rocky Marciano's 87.76%. He has never been knocked down in any professional boxing bout and has also never lost a decision. His two losses have come via a shoulder injury during a fight and a deep cut above his eye, which were recorded as TKO losses. His power and his possession of a Ph.D have led to his nickname, Dr. Ironfist.

Jimmy Thunder (born 3 February 1966 in Apia, Western Samoa as James Peau), is a former Samoan boxer.

During his early life and amateur career, Thunder was known as Jimmy Peau. His mother Papaliitele Milagi Leaupepe is from the village of Fasitoouta, and his father Lupematasila Maalo Faasavalu Peau is from the village of Falelatai. Thunder was born third out of six siblings. They all grew up in Auckland, New Zealand. Jimmy is also a direct descendant of the paramount royal chief of Samoa Malietoa NatuitasinaTaimalelagi from his grandmother's side. She was Malelega, daughter of Aionofaasisina, son of Pouvi Malietoa who was the son of Malietoa Natuitasina Taimalelagi. Thunder was also bestowed the chief title 'Ti'a' in Fasitoouta Samoa in 1996.

He went to school at Onehunga High School in Auckland. His friend introduced Thunder to Gerry Preston. Preston took on the young Samoan into his boxing gym in Mangere Bridge. In his early amateur days, Thunder became the first Samoan-born fighter to win a gold medal in the heavyweight division, representing New Zealand at the 1986 Commonwealth Games in Edinburgh, Scotland. He defeated Dougie Young in his hometown by unanimous decision. It was one of the nine gold medals won for New Zealand in that year.

Ikemefula "Ike" Charles Ibeabuchi (born February 2, 1973 in Isuochi, Nigeria) is a former professional heavyweight boxer who defeated highly ranked contender David Tua and future heavyweight titlist Chris Byrd. Ibeabcuhi's ring nickname is "The President." After compiling a record of 20-0 with 15 knockouts, he was imprisoned following charges that he tried to rape a woman in Las Vegas in July 1999.

Ibeabuchi planned on joining the Nigerian military before he witnessed Buster Douglas knockout Mike Tyson in 1990. Inspired by the fight, Ibeabuchi started boxing.

Ibeabuchi twice defeated countryman and eventual 1996 Olympic bronze medalist Duncan Dokiwari. He emigrated to the Dallas area with his mother in 1993 and won the Dallas and Texas Golden Gloves tournaments in 1994.

Under the guidance of former world welterweight champion Curtis Cokes, Ibeabuchi made his professional debut with a second round knockout of Ismael Garcia on October 13, 1994.

After winning 16 straight fights against club fighters and journeymen, Ibeabuchi made a big jump in competition and fought undefeated prospect David Tua for the WBC International Heavyweight title on June 7, 1997. Tua was 27-0 and considered by many analysts to be the "next Tyson."