Mikaela Mayer

Mikaela Mayer
Mayer in 2016
Personal information
BornMikaela Joslin Mayer
(1990-07-04) July 4, 1990
Los Angeles, California, U.S.
Height5 ft 9 in (175 cm)
Weight
Boxing career
Reach66+1⁄2 in (169 cm)
StanceOrthodox
Boxing record
Total fights24
Wins22
Win by KO5
Losses2
Medal record
Women's Amateur boxing
Representing  United States
World Championships
2012 Qinhuangdao Light welterweight

Mikaela Joslin Mayer (born July 4, 1990) is an American professional boxer who has held world championships in three weight classes and is the current unified world female super-welterweight champion since October 2025, holding the WBA, WBC and WBO titles. She has also held the WBO welterweight title since September 2024. Mayer is a former unified female super-featherweight world champion, having held the WBO and IBF titles simultaneously. She has also held the interim WBC female lightweight title. As an amateur, she won a bronze medal at the 2012 World Championships and competed for the U.S. at the 2016 Olympics.

In 2025, Mayer was named Sports Illustrated's Female Fighter of the Year.[1]

Amateur career

Mayer competed internationally as part of Team USA in the women's 60 kg category at the 2016 Rio Summer Olympics.[2][3] She defeated Jennifer Chieng in the Round of 16 before being eliminated in the quarterfinal by Russian Anastasia Belyakova, who took a majority decision.[4]

Amateur accolades

Professional career

After signing a promotional deal with Top Rank,[6] Mayer made her professional debut on 5 August 2017, defeating Widnelly Figueroa by first-round knockout.[7]

Mayer beat Ewa Brodnicka by unanimous decision to win the WBO female super-featherweight World title at the MGM Grand in Las Vegas on 31 October 2020. Her Polish opponent had been reigning champion but was stripped of the belt after failing to make the 130-pound weight limit.[8]

On 5 November 2021, she took on IBF female super-featherweight World champion Maïva Hamadouche in a contest that saw both women's titles and the inaugural Ring female super-featherweight belt on the line. Mayer prevailed by unanimous decision.[9]

Seeking to further unify the division, Mayer faced WBC and IBO champion Alycia Baumgardner in London, England, on 15 October 2022. She lost via split decision with judges John Latham and Steve Gray making Baumgardner the winner, both scoring the fight 96-95, while Terry O’Connor gave it to Mayer 97-93.[10]

Mayer switched to lightweight for her next outing where she was scheduled to face Christina Linardatou on 15 April 2023, but the Greek boxer failed her pre-fight medical. Sweden's Lucy Wildheart stepped in as a last-minute replacement with Mayer winning by unanimous decision to became the interim WBC female lightweight World champion.[11]

Mayer vs. Jonas

Another change in weight division saw Mayer challenge IBF female welterweight World champion Natasha Jonas in Liverpool, England, on 20 January 2024. After a closely fought contest, it was the English boxer who came out on top winning by split decision with judge Diana Drews Milano scoring the fight for Mayer 97-93 but Frank Lombardi (96-94) and Michael Alexander (96-95) giving it to Jonas.[12][13][14]

WBO Welterweight Champion

Mayer vs. Ryan

Mayer was scheduled to challenge WBO welterweight champion Sandy Ryan in New York on September 27, 2024.[15] She won the fight by majority decision.[16] On the day of the fight, while leaving to the event, Ryan was hit by a tin of paint at her hotel.[17] Two days after the fight, Ryan demanded an immediate rematch in light of the paint incident and alleged threats against her and her support team.[18]

Mayer vs. Ryan 2

Mayer made the first defense of her WBO welterweight title in a rematch against Sandy Ryan at Fontainebleau in Las Vegas on 29 March 2025. She won by unanimous decision.[19][20][21]

Unified Super-welterweight Championship

Mayer vs. Spencer

Mayer challenged WBA female super-welterweight champion Mary Spencer on October 30, 2025, at Casino de Montreal in Montreal, Canada.[22] The vacant WBC and WBO female super-welterweight titles were also on the line.[23][24] Mayer won by unanimous decision.[25][26]

In March 2026, it was announced that Mayer signed with Most Valuable Promotions.[27]

Professional boxing record

24 fights 22 wins 2 losses
By knockout 5 0
By decision 17 2
No. Result Record Opponent Type Round, time Date Location Notes
24 Win 22–2 Mary Spencer UD 10 Oct 30, 2025 Montreal Casino, Montreal, Canada Won WBA, vacant WBC, and WBO light middleweight titles
23 Win 21–2 Sandy Ryan UD 10 Mar 29, 2025 Fontainebleau, Las Vegas, Nevada, U.S. Retained WBO female welterweight title
22 Win 20–2 Sandy Ryan MD 10 Sep 27, 2024 The Theater at Madison Square Garden, New York City, New York, U.S. Won WBO female welterweight title
21 Loss 19–2 Natasha Jonas SD 10 Jan 20, 2024 Liverpool Arena, Liverpool, England For IBF female welterweight title
20 Win 19–1 Silvia Bortot UD 10 Sep 2, 2023 Manchester Arena, Manchester, England
19 Win 18–1 Lucy Wildheart UD 10 Apr 15, 2023 Copper Box Arena, London, England Won vacant WBC interim lightweight title
18 Loss 17–1 Alycia Baumgardner SD 10 Oct 15, 2022 The O2 Arena, London, England Lost WBO, IBF, and The Ring female super featherweight titles;
For WBC female super featherweight title
17 Win 17–0 Jennifer Han UD 10 Apr 9, 2022 OC Fair & Event Center, Costa Mesa, California, U.S. Retained WBO, IBF, The Ring female super featherweight titles
16 Win 16–0 Maïva Hamadouche UD 10 Nov 5, 2021 Virgin Hotels Las Vegas, Paradise, Nevada, U.S. Retained WBO female super featherweight title;
Won IBF and inaugural The Ring super featherweight titles
15 Win 15–0 Érica Farías UD 10 Jun 19, 2021 Virgin Hotels Las Vegas, Paradise, Nevada, U.S. Retained WBO female super featherweight title
14 Win 14–0 Ewa Brodnicka UD 10 Oct 31, 2020 MGM Grand Conference Center, Paradise, Nevada, U.S. Won vacant WBO female super featherweight title
13 Win 13–0 Helen Joseph UD 10 Jul 14, 2020 MGM Grand Conference Center, Paradise, Nevada, U.S.
12 Win 12–0 Alejandra Soledad Zamora RTD 6 (10), 2:00 Oct 26, 2019 Reno-Sparks Convention Center, Reno, Nevada, U.S. Retained WBC-NABF female super featherweight title
11 Win 11–0 Lizbeth Crespo UD 10 Jun 15, 2019 MGM Grand Garden Arena, Paradise, Nevada, U.S.
10 Win 10–0 Yareli Larios UD 8 Feb 15, 2019 Grand Casino, Hinckley, Minnesota, U.S. Retained WBC-NABF female super featherweight title
9 Win 9–0 Calista Silgado UD 8 Dec 14, 2018 American Bank Center, Corpus Christi, Texas, U.S. Retained WBC-NABF female super featherweight title
8 Win 8–0 Vanessa Bradford UD 8 Oct 13, 2018 CHI Health Center, Omaha, Nebraska, U.S. Won vacant WBC-NABF female super featherweight title
7 Win 7–0 Edina Kiss TKO 3 (6), 2:00 Aug 25, 2018 Gila River Arena, Glendale, Arizona, U.S.
6 Win 6–0 Sheena Flamand UD 6 Jun 30, 2018 Chesapeake Energy Arena, Oklahoma City, Oklahoma, U.S.
5 Win 5–0 Baby Nansen UD 6 May 12, 2018 Madison Square Garden, New York City, New York, U.S.
4 Win 4–0 Maria Semertzoglou KO 1 (4), 0:35 Mar 10, 2018 StubHub Center, Carson, California, U.S.
3 Win 3–0 Nydia Feliciano MD 4 Dec 9, 2017 The Theater at Madison Square Garden, New York City, New York, U.S.
2 Win 2–0 Allison Martinez TKO 3 (4), 0:39 Sep 22, 2017 Convention Center, Tucson, Arizona, U.S.
1 Win 1–0 Widnelly Figueroa KO 1 (4), 1:15 Aug 5, 2017 Microsoft Theater, Los Angeles, California, U.S.

Personal life

Between 2003 and 2005, Mayer played bass in heavy metal band Lia-Fail, which also included Nita Strauss.[28][29]

See also

Wikimedia Commons has media related to Mikaela Mayer.

References

  1. ^ "Terence Crawford Goes Out on Top As SI's 2025 Fighter of the Year". SI. January 5, 2026. Retrieved January 5, 2026.
  2. ^ Stevens, Carrie (May 8, 2013). "How Boxer Mikaela Mayer Knocks Out Cravings". Fitness.
  3. ^ Nuñez, Alanna (September 20, 2013). "How Model-Turned-Boxer Mikaela Mayer Stays Fit". Shape.
  4. ^ Kevin Iole (August 15, 2016). "American boxer Mikaela Mayer falls just short of Olympic medal". Sports.yahoo.com. Retrieved September 16, 2016.
  5. ^ a b c d e f g h i "Mikaela Mayer profile". TeamUSA.org. United States Olympic Committee. Archived from the original on March 1, 2014. Retrieved September 24, 2013.
  6. ^ "US Olympic boxer Mikaela Mayer turns pro with Top Rank". ESPN. Retrieved May 21, 2024.
  7. ^ "Mikaela Mayer wins pro debut with first-round KO". SportsNet. August 6, 2017. Retrieved May 21, 2024.
  8. ^ "Mikaela Mayer Decisions Ewa Brodnicka To Capture WBO Title". Boxing Scene. October 31, 2020. Retrieved May 21, 2024.
  9. ^ "Mikaela Mayer downs Maiva Hamadouche by unanimous decision to unify junior lightweight titles". ESPN. November 6, 2021. Retrieved May 21, 2024.
  10. ^ "Alycia Baumgardner Edges Mikaela Mayer With Split Decision To Unify Titles". Boxing Scene. October 15, 2022. Retrieved May 21, 2024.
  11. ^ "Mikaela Mayer Outworks Lucy Wildheart, Wins Decision To Capture WBC Interim-Title". Boxing Scene. April 15, 2023. Retrieved May 21, 2024.
  12. ^ "Natasha Jonas Edges Mikaela Mayer in Fire-Fight With Split Decision, Retains IBF Title". Boxing Scene. January 20, 2024. Retrieved May 21, 2024.
  13. ^ "Natasha Jonas v Mikaela Mayer: Briton retains welterweight world title by split decision". BBC Sport. January 20, 2024. Retrieved December 17, 2024.
  14. ^ "Natasha Jonas Retains World Title Against Mikaela Mayer". Big Fight Weekend. January 20, 2024. Retrieved December 17, 2024.
  15. ^ Iskenderov, Parviz (August 5, 2024). "Mikaela Mayer challenges Sandy Ryan at MSG in New York in September". FIGHTMAG.
  16. ^ Christ, Scott (September 28, 2024). "Mikaela Mayer wins WBO title from Sandy Ryan after paint attack controversy". Bad Left Hook.
  17. ^ Iskenderov, Parviz (September 28, 2024). "Video: Sandy Ryan hit with tin of paint ahead of Mikaela Mayer fight in New York". FIGHTMAG.
  18. ^ "Ryan wants immediate Mayer rematch after paint attack". BBC Sport. September 30, 2024. Retrieved October 1, 2024.
  19. ^ "Mikaela Mayer again tops Sandy Ryan, retains welterweight title". Boxing Scene. Retrieved March 30, 2025.
  20. ^ "Mayer retains title with points win over Briton Ryan". BBC Sport. Retrieved March 30, 2025.
  21. ^ "Mikaela Mayer defeats Sandy Ryan by unanimous decision". ESPN. Retrieved March 30, 2025.
  22. ^ "Mary Spencer And Wilkens Mathieu Feature In October 30 Montreal Double-header". boxingnewsonline.net. August 29, 2025.
  23. ^ "Three world titles now on the line in Mary Spencer vs. Mikaela Mayer". Boxing Scene. Retrieved October 28, 2025.
  24. ^ "Mary Spencer vs Mikaela Mayer now three-belt world title fight". badlefthook.com. Retrieved October 28, 2025.
  25. ^ "Mikaela Mayer takes three super welterweight titles in dominant win over Mary Spencer". badlefthook.com. Retrieved October 31, 2025.
  26. ^ "Mikaela Mayer goes big and goes home a three-belt winner". Boxing Scene. Retrieved October 31, 2025.
  27. ^ "Mikaela Mayer joins MVP, open to Alycia Baumgardner rematch". FIGHTMAG. March 13, 2026.
  28. ^ "Inside the music: The story of the fast rise and quick fall of Mikaela Mayer's teenage metal band". ESPN.com. June 16, 2021.
  29. ^ "NITA STRAUSS To Play Boxing Champion MIKAELA MAYER To Ring For Historic Title Unification Bout". BLABBERMOUTH.NET. November 5, 2021.

Other sources

Sporting positions
Regional boxing titles
Vacant
Title last held by
Sarah Pucek 		NABF super-featherweight champion
October 13, 2018 – October 31, 2020
Won world title 		Vacant
World boxing titles
Vacant
Title last held by
Ewa Brodnicka 		WBO super-featherweight champion
October 31, 2020 – October 15, 2022 		Succeeded by
Preceded by IBF super-featherweight champion
November 5, 2021 – October 15, 2022
Inaugural champion The Ring super-featherweight champion
November 5, 2021 – October 15, 2022
Vacant
Title last held by
Érica Farías 		WBC lightweight champion
Interim title
April 15, 2023 – December 2023
Vacated 		Vacant
Title next held by
Maira Moneo
Preceded by WBO welterweight champion
September 27, 2024 – present 		Incumbent
Preceded by WBA light-middleweight champion
October 30, 2025 – present
Vacant
Title last held by
Cecilia Brækhus 		WBC light-middleweight champion
October 30, 2025 – present
WBO light-middleweight champion
October 30, 2025 – present
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