Mikaela Mayer losses
Over 9 years as a professional, Mikaela Mayer has compiled a 22-3 (5) record, including 15 title fights across four weight classes. She has three losses, all of them in title fights.
3. Mikaela Mayer loses to Chantelle Cameron via unanimous decision
On August 29, 2026 Mikaela Mayer, the WBC and WBO super welterweight champion, met Chantelle Cameron, the WBO super welterweight champion, in a title unification fight. Mayer was 36 years old with a record of 22-2, and Cameron was 35 with a record of 22-1. Mayer was on a 3-fight winning streak and Cameron was on a 4-fight winning streak. Mayer lost via unanimous decision. Lost the title in unification. Went the distance with Cameron.
2. Mikaela Mayer loses to Natasha Jonas via split decision
On January 20, 2024 Mikaela Mayer fought Natasha Jonas for the IBF welterweight title. Mayer was 33 years old with a record of 19-1, and Jonas was 39 with a record of 14-2-1. Mayer was on a 2-fight winning streak and Jonas was on a 5-fight winning streak. Mayer lost via split decision. Failed to capture the title. Went the distance with Jonas.
1. Mikaela Mayer loses to Alycia Baumgardner via split decision
On October 15, 2022 Mikaela Mayer, the WBO, IBF, and The Ring super featherweight champion, met Alycia Baumgardner, the WBC and IBO super featherweight champion, in a title unification fight. Mayer was 32 years old with a record of 17-0, and Baumgardner was 28 with a record of 12-1. Mayer was on an undefeated 17-fight winning streak and Baumgardner was on a 6-fight winning streak. Mayer lost via split decision. Lost the title in unification. Went the distance with Baumgardner.