Floyd Mayweather jnr, considered by many the best pound-for-pound fighter in boxing, announced his retirement on Friday.
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Floyd Mayweather jnr announces retirement
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Alonzo Mourning announces his retirement
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Chisora, Haye to face lifetime boxing ban ?
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Floyd Mayweather to announce next opponent around the time of Super Bowl XLVII
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Lance Armstrong formally announces retirement
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Michael Floyd likely done for the season
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Manny Pacquiao and Floyd Mayweather Jr go mediation
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Strikeforce's Frank Shamrock will return to the cage
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Ferrer cuts Anderson down to size
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Vitali Klitschko will retire at the end of 2010
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Former UFC light heavyweight champion Forrest Griffin retires
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Frankie Edgar officially moving down to featherweight
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WBA light heavyweight world champion Green quits boxing
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Robinson comes out of retirement
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Popular sprinter Mitanni retired
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Dallas Drake announces retirement
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Armstrong coming out of retirement