According to Wikipedia,
Claressa Maria Shields is an American professional boxer and mixed martial artist. She has held multiple world championships in three weight classes, including the undisputed female light middleweight title since March 2021; the undisputed female middleweight title from 2019 to 2020; and the unified WBC and IBF female super middleweight titles from 2017 to 2018. Shields currently holds the record for becoming a two and three-weight world champion in the fewest professional fights. As of October 2022, she is ranked as the world's best active female middleweight by BoxRec, as well as the best active female boxer, pound for pound, by ESPN and The Ring.
Claressa Shields is affiliated with the following schools: