List of undefeated world boxing champions

This is a list of world champions in professional boxing who retired undefeated, either during or after a title reign(s). It excludes current titleholders. Each champion's record is shown in the following format: wins–losses–draws (no contests).

Undefeated male champions
BoxerRecordWeight classTitle(s)Championship yearsTitle defensesNotes
Jimmy Barry [1] 58–0–10 (1) Bantamweight World 1894-1919 4 withdraws by opponent
Joe Calzaghe[2] 46–0–0 (0) Super middleweight WBO 1997–2008 21 Vacated title to move up to light heavyweight.
IBF 2006 1 Vacated title to fight Peter Manfredo Jr. instead of #1 contender Robert Stieglitz.
The Ring, lineal 2006–2008 3 Vacated titles to move up to light heavyweight.
WBA, WBC 2007–2008 0
Light heavyweight The Ring 2008 1 Retired and vacated title.
Kim Ji-won[3] 16–0–2 (0) Super bantamweight IBF 1985–1986 4
Mihai Leu[4] 28–0–0 (0) Welterweight WBO 1997 1 Retired from boxing due to an injury.
Ricardo López[3] 51–0–1 (0) Minimumweight WBC 1990–1998 22 Vacated title to move up to light flyweight.
WBO 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 1998 0 Vacated title to move up to junior flyweight.
Light flyweight IBF 1999–2002 2
Rocky Marciano[3][6] 49–0–0 (0) Heavyweight World 1952–1956 6
Terry Marsh[3][4] 26–0–1 (0) Light welterweight IBF 1987 1 Retired from boxing due to epilepsy.
Floyd Mayweather Jr.[7] 50–0–0 (0) Super featherweight WBC 1998–2002 8 Vacated title to move up to lightweight.
Lightweight WBC 2002–2004 3 Vacated title to move up to light welterweight.
Light welterweight WBC 2005–2006 0 Vacated title to move up to welterweight.
Welterweight WBA, WBC 2006–2008, 2011–2015 8 Retired at 49–0 in 2015; returned in 2017 for non-title McGregor fight and then retired again.
Light middleweight WBA, WBC 2007, 2012–2015, 2017 2
Jack McAuliffe[8] 28–0–10 Lightweight World 1886–1893 7–0–2 (0)
Sven Ottke[3] 34–0–0 (0) Super middleweight IBF 1998–2004 21
WBA 2003–2004 4 Defended IBF title and defeated WBA champion to become WBA Super champion.
Dmitry Pirog 20–0–0 (0) Middleweight WBO 2010–2012 3 Retired from boxing due to chronic spinal injuries.
Harry Simon[9] 31–0–0 (0) Light middleweight WBO 1998–2001 4 Vacated title to move up to middleweight.
Middleweight WBO 2002 0 Won WBO interim middleweight title in 2001 and the outright title in 2002. Stripped of title at 22–0 when he was unable to defend it due to injuries suffered in a car crash. Had others non-title fights before retiring.
Pichit Sitbangprachan[9] 24–0–0 (0) Flyweight IBF 1992–1994 5 Retired at 21–0 and then made a comeback.
Edwin Valero[10] 27–0–0 (0) Super featherweight WBA 2006–2008 4 Vacated title to move up to lightweight.
Lightweight WBC 2009–2010 2 Vacated title to move up to light welterweight. Committed suicide after allegedly killing his wife in 2010. All 27 fights were knockout wins.
Andre Ward[11] 32–0–0 (0) Super middleweight WBA 2009–2015 6 Vacated titles in 2015 to move up to light heavyweight.
WBC, The Ring, lineal 2011–2015 1 (WBC), 2 (The Ring, lineal)
Light heavyweight WBA, WBO, The Ring, lineal 2016–2017 1 (WBA, IBF, WBO), 0 (The Ring, lineal)

Undefeated female champions
BoxerRecordWeight classTitle(s)Championship yearsTitle defensesNotes
Michele Aboro[12] 21–0–0 (0) Super bantamweight WIBF 2000–2001 3
Nicola Adams[13] 5–0–1 (0) Flyweight WBO 2019 1 Retired due to medical concerns.
Laila Ali 24–0–0 (0)
Kara Ro 17–0–0 (0)
Wang Ya Nan 8–0–0 (0)

See also

References
  1. "Jimmy Barry". Cyber Boxing Zone. Retrieved December 27, 2014.
  2. "Undefeated Calzaghe quits boxing". BBC. February 5, 2009. Retrieved August 31, 2013.
  3. "US elite join race for Calzaghe". BBC. November 17, 2008. Retrieved August 31, 2013.
  4. Justin Tate (June 20, 2011). "Boxing: David Haye and 7 Greatest Fighters to Retire with Less Than 30 Bouts: People Who Did Not Make My List at All". Bleacher Report. Retrieved August 31, 2013.
  5. "Jamili Takes Strawweight Title". New York Times. Retrieved December 27, 2014.
  6. "Undefeated heavyweight boxing champion, boxing". Guinness World Records. Retrieved August 31, 2013.
  7. Undefeated Floyd Mayweather confirms retirement, Sky Sports, 13/09/2015
  8. "Jack McAuliffe". Cyber Boxing Zone. Retrieved December 27, 2014.
  9. Michael Rosenthal. "10: Boxers who finished careers undefeated". The Ring magazine. Retrieved August 31, 2013.
  10. Justin Tate (June 20, 2011). "Boxing: David Haye and 7 Greatest Fighters to Retire with Less Than 30 Bouts: 7. Edwin Valero". Bleacher Report. Retrieved August 31, 2013.
  11. Graham, Bryan Armen (21 September 2017). "Andre Ward, boxing's pound-for-pound world No1, announces shock retirement". The Guardian. Retrieved 21 September 2017.
  12. "Where are They Now: Retired World Champion Michele Aboro!". www.womenboxing.com. Retrieved 2019-12-03.
  13. BBC Editors (November 6, 2019). "Nicola Adams: Two-time Olympic champion retires over fears for her sight". BBC. Retrieved November 6, 2019.
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