Women's boxing legend Claressa Shields has made a big decision in her combat sports career, stating she's "done" with MMA.

Claressa Shields shows off her skills at a media workout ahead of her undisputed heavyweight title defense against Lani Daniels in Detroit.

Claressa Shields, of Flint, Michigan, is a three-division champion. She's the only fighter, man or woman, to be undisputed champion in three different divisions in the four-belt era. Shields is ...