  urlLink Mike Tyson is a professional boxer who at the age of 20 became the youngest heavyweight champion ever. He won the WBC title on November 22, 1986 by defeating Trevor Berbick, and by August 1, 1987, he had won the WBA and IBF titles to become the undisputed heavyweight champion of the world.
In 1988 he had two of his best remembered fights, a fourth round technical knockout of a diminished Larry Holmes, and a demolition of previously undefeated (professsionally) Michael Spinks in just over 91 seconds. However, his career began heading downhill shortly thereafter, as chaos engulfed his personal life and he lost focus in his career. In 1990 he lost a somewhat controversial fight to James "Buster" Douglas in a tenth round knockout. On February 10, 1992 he was convicted of raping an 18 year old beauty contestant, and he went to prison for three years. Upon his release he was able to regain the WBC and WBA titles, but his 1996 fight with Evander Holyfield ended in an 11th round TKO for Holyfield. In the 1997 rematch, urlLink Tyson bit Holyfield's urlLink ear not once but twice, getting a significant chunk- and disqualified- the second time.
Since then he has had continuing brushes with the law and only one meaningful fight, which he urlLink lost to champion Lennox Lewis during the eighth round of brutality. Now he is a urlLink raving lunatic of steadily diminishing relevance. urlLink Bobby Fischer is the only American to have been a FIDE world chess champion. In 1956, he won the U.S. Junior championship at the age of 13, and in 1958 he won the U.S. Championship at the age of 14 years and 9 months, scoring 8 wins, 5 draws, and no losses. Over the next decade he dominated national competition, winning 7 more U.S. Championships. His urlLink final record in U.S. Championships was 61 games won, 26 games drawn, and 3 games lost. In 1962 he won the 'Interzonal' competition in Stockholm, Sweden, becoming the first non-Soviet player to win an Interzonal. In 1967 he withdrew from the Interzonal in Sousse, Tunisia, despite leading with 7 wins and 3 draws. In 1969 he refused to participate in the U.S. Championship, but several players deferred to Fischer to allow him to play in the Interzonals.
After winning the Interzonal, he destroyed Mark Taimanov, Brent Larsen, and Tigran Petrosian to establish himself as the clear challenger to World Champion Boris Spassky. In July 1972 the match between urlLink Fischer and Spassky began after substantial wrangling about revenues and arrangements. Fischer lost the first game and did not show up for the second, which he lost by forfeit. However, he won 3 of the next 4 games and went on to win the match 12.5-8.5, becoming World Champion and the first player with a FIDE ELO rating over 2700.
Thereafter, Fischer did not play another official game until 1992, forfeiting his title in 1975 to Anatoly Karpov when FIDE would not accept his demands for how the match would be played. In 1992 he traveled to Yugoslavia for a rematch with Spassky in violation of a United Nations embargo against the country. Since then, he has been a fugitive from United States justice, although he was recently apprehended in Japan and may be deported soon.
Now he is a urlLink raving lunatic of steadily diminishing relevance. 
