Mikaela Mayer is the current WBA, WBC and WBO super-welterweight champion with a professional record of 22-2 (5 KOs).
Mayer entered the professional ranks in 2017, and over the next three years she rattled off 13 consecutive victories to earn her first world title fight in October 2020.
She claimed the vacant WBO super-featherweight title with a unanimous decision win over Ewa Brodnicka, and in her first defence the following June she out-pointed Erica Farias.
The 36-year-old American added the IBF and Ring Magazine titles with a points win over Maiva Hamadouche in late 2021, and successfully defended all three belts in April 2022 as she downed Jennifer Han on points.
However, Mayer’s reign and perfect run was brought to a halt in October of that year as she lost a unification fight with Alycia Baumgardner by split decision.
She rebounded in her next outing to beat Lucy Wildheart by unanimous decision to claim the interim WBC lightweight title, and then registered a points success against Silvia Bortot to land another world title fight in early 2024.
However, that night ended in disappointment for the American, as she suffered a split decision defeat to IBF welterweight champion Natasha Jonas.
Mayer has not lost since though, recording back-to-back decision wins over Sandy Ryan to win and then successfully defend the WBO welterweight crown.
Then, in October of last year, she beat Mary Spencer on points to claim the WBA, WBC and WBO super-welterweight titles.