Mikaela Mayer (21-2, 5) was born in Los Angeles, California, U.S. on July 4, 1990. At the age of 27 years on August 5, 2017, she made her professional boxing debut against Widnelly Figueroa, winning the fight via 1st-round KO.
On her 14th career fight at 30 years old, Mayer became a super-featherweight world champion on October 31, 2020 after defeating Ewa Brodnicka via 10-round unanimous decision to win the vacant WBO title.
She then went on to become world champion at the welterweight weight class as well, winning the WBO title against Maïva Hamadouche via 10-round unanimous decision on November 5, 2021.
Mayer's last fight was a welterweight (WBO) world-title defense against Sandy Ryan on March 29, 2025. She won the fight via 10th-round unanimous decision and successfully defended the title. She is on a 2-fight winning streak.
Some of Mikaela Mayer's best fights have been against Maïva Hamadouche, Jennifer Han, Érica Farías, Sandy Ryan and Alycia Baumgardner. For details about these fights refer to "Best fights of Mikaela Mayer".
Mayer has 2 losses on her boxing record. For details about these losses refer to "Mikaela Mayer Losses".
| # | Date | Opponent | Weight | Round | Method | Result |
|---|---|---|---|---|---|---|
23  | Mar 29, 2025 34 years, 8 months 21-2 (5) | 31 years, 6 months 7-2-1 (3) | WL | 10 | UD | Win Defended WBO |
22 | Sep 27, 2024 34 years, 2 months 20-2 (5) | 31 years 7-1-1 (3) | WL | 10 | MD | Win Won WBO |
21  | Jan 20, 2024 33 years, 6 months 19-2 (5) | 39 years, 7 months 14-2-1 (9) | WL | 10 | SD | Loss For IBF |
20 | Sep 2, 2023 33 years, 1 months 19-1 (5) | Silvia Bortot | LT | 10 | UD | Win |
19 | Apr 15, 2023 32 years, 9 months 18-1 (5) | Lucy Wildheart | LT | 10 | UD | Win Won WBC InterimVacant |
18  | Oct 15, 2022 32 years, 3 months 17-1 (5) | 28 years, 4 months 12-1 (7) | SFT | 10 | SD | Loss Lost WBO, IBF, The Ring For WBC |
17  | Apr 9, 2022 31 years, 9 months 17-0 (5) | 38 years, 9 months 18-4-1 (1) | SFT | 10 | UD | Win Defended WBO, IBF, The Ring |
16  | Nov 5, 2021 31 years, 4 months 16-0 (5) | 32 years 22-1 (18) | SFT | 10 | UD | Win Won IBF, The Ring Defended WBO |
15  | Jun 19, 2021 30 years, 11 months 15-0 (5) | 36 years, 11 months 26-4 (10) | SFT | 10 | UD | Win Defended WBO |
14 | Oct 31, 2020 30 years, 3 months 14-0 (5) | Ewa Brodnicka | SFT | 10 | UD | Win Won WBO Vacant |
13 | Jul 14, 2020 30 years 13-0 (5) | Helen Joseph | SFT | 10 | UD | Win |
12 | Oct 26, 2019 29 years, 3 months 12-0 (5) | Alejandra Soledad Zamora | SFT | 6 | RTD | Win |
11 | Jun 15, 2019 28 years, 11 months 11-0 (4) | Lizbeth Crespo | SFT | 10 | UD | Win |
10 | Feb 15, 2019 28 years, 7 months 10-0 (4) | Yareli Larios | SFT | 8 | UD | Win |
9 | Dec 14, 2018 28 years, 5 months 9-0 (4) | Calista Silgado | SFT | 8 | UD | Win |
8 | Oct 13, 2018 28 years, 3 months 8-0 (4) | Vanessa Bradford | SFT | 8 | UD | Win |
7 | Aug 25, 2018 28 years, 1 months 7-0 (4) | Edina Kiss | 3 | TKO | Win | |
6 | Jun 30, 2018 27 years, 11 months 6-0 (3) | Sheena Flamand | 6 | UD | Win | |
5 | May 12, 2018 27 years, 10 months 5-0 (3) | Baby Nansen | 6 | UD | Win | |
4 | Mar 10, 2018 27 years, 8 months 4-0 (3) | Maria Semertzoglou | 1 | KO | Win | |
3 | Dec 9, 2017 27 years, 5 months 3-0 (2) | Nydia Feliciano | 4 | MD | Win | |
2 | Sep 22, 2017 27 years, 2 months 2-0 (2) | Allison Martinez | 3 | TKO | Win | |
1 | Aug 5, 2017 27 years, 1 months 1-0 (1) | Widnelly Figueroa | 1 | KO | Win |
