Jiménez took up boxing at the age of 23 in order to lose weight and went on to become a world champion less than four years later. Before turning pro Jiménez won 10 amateur bouts, half of them coming against male boxers.[2] Jiménez is the former WBC female heavyweight champion and the second Mexican born boxer to hold a world heavyweight title, first being Martha Salazar who Jiménez won the title from on 18 March 2016.[3][4]
She defeated Franchón Crews-Dezurn by split decision to win the WBC and WBO female super middleweight titles on 11 January 2020.[5][6] However, in February 2020, the result of the fight was changed to a "no decision," due to Jimenez having failed a pre-fight drug test and she was subsequently suspended for nine months and stripped of the titles.[7][8]
In December 2022, Jiménez retired from professional boxing amid allegations that she was born male. In response to the allegations, Jiménez stated that she has hypothyroidism.[9]