Claressa "TRex" Shields is a 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 is the only boxer in history to hold all four major world titles in boxing—WBA, WBC, IBF and WBO—simultaneously, in two weight classes. She is also the first woman to win lineal championships in two weight classes. In a decorated amateur career, Shields won gold medals in the women's middleweight division at the 2012 and 2016 Olympics, making her the first American boxer to win consecutive Olympic medals! Show more