List of undefeated boxing world champions

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This list of undefeated boxing world champions excludes current title holders.

Undefeated boxing world champions
Boxer Weight class Championship years Title defenses Notes
Jimmy Barry[1] Bantamweight 1894-1899 6 (3 draws) Retired undefeated (59-0-9 with 2 NC).
Joe Calzaghe[2] WBO super middleweight 1997-2007 21 Vacated title to move up to light heavyweight.
IBF and The Ring super middleweight 2006-2007 1 (IBF)
3 (The Ring)		 Unified WBO, IBF and The Ring titles. Vacated IBF title to fight Peter Manfredo, Jr. instead of #1 contender Robert Stieglitz. Vacated The Ring title to move up to light heavyweight.
WBA and WBC super middleweight 2007-2008 0 Unified WBO, WBA, WBC and The Ring titles. Vacated titles to move up to light heavyweight.
The Ring light heavyweight 2008 1 Retired undefeated (46-0).
Ji-Won Kim[3] IBF junior featherweight 1985-1986 4 Retired undefeated (16-0-2).
Mihai Leu
aka Michael Loewe[4]		 WBO welterweight 1997 1 Retired undefeated (28-0). Forced to retire from boxing due to an injury.
Ricardo López[3] WBC mini flyweight 1990-1998 21 (1 draw) Vacated title to move up to junior flyweight.
WBO mini flyweight 1997-1998 0 Unified WBC and WBO titles. Stripped of WBO title for saying he wanted to give the belt to his father.[5]
WBA mini flyweight 1998 0 Vacated title to move up to junior flyweight.
IBF junior flyweight 1999-2002 2 Retired undefeated (51-0-1).
Rocky Marciano[3][6] heavyweight 1952-1956 6 Retired undefeated (49-0).
Terry Marsh[3][4] IBF junior welterweight 1987 1 Retired undefeated (26-0-1). Forced to retire from boxing due to epilepsy.
Floyd Mayweather[7] WBC super featherweight 1998-2002 8 Vacated title to move up to lightweight.
WBC lightweight 2002-2004 3 Vacated title to move up to super lightweight.
WBC super lightweight 2005-2006 0 Vacated title to move up to welterweight.
welterweight 2006-2008, 2011-2015 8 Retired undefeated (49-0).
super welterweight 2007, 2012-2015 2
Jack McAuliffe[8] lightweight 1886-1893 7 (2 draws) Retired undefeated (30-0-5 with 1 No decision).
Sven Ottke[3] IBF super middleweight 1998-2004 21
WBA "Super" super middleweight 2003-2004 4 Defended IBF title and defeated WBA champion to become WBA "Super" champion. Retired undefeated (34-0).
Dmitry Pirog[9] WBO middleweight 2010-2012 3 Retired undefeated (20-0). Forced to retire from boxing due to debilitating back injury.
Harry Simon[10] WBO junior middleweight 1998-2001 4 Vacated title to move up to middleweight.
WBO middleweight 2002 0 Won interim WBO middleweight title in 2001 and the outright title in 2002. Stripped of title when he was unable to defend it due to injuries suffered in a car crash.
Pichit Sitbangprachan[10] IBF flyweight 1992-1994 5 Retired undefeated (21-0) and then made a comeback, winning three more times before retiring for good (24-0).
Edwin Valero[11] WBA super featherweight 2006-2008 4 Vacated title to move up to lightweight.
WBC lightweight 2009-2010 2 Vacated title to move up to junior welterweight. Committed suicide after killing his wife in 2010. His record was 27-0 with 27 knockouts.

References

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  7. ↑ Undefeated Floyd Mayweather confirms retirement, Sky Sports, 13/09/2015
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