Bare Knuckle Fighting Championships – BKFC

BYB Extreme Knuckle Fighting Series

Spartan BK Fight Club LTD

Bare Knuckle Kombat – BKK

Valor BK

Bare Knuckle Boxing- BKB UK

Bare Fist Boxing Association- BFBA

Ultimate Bare Knuckle Boxing – UBKB

Mahatch Fighting Championship

Bad to the Bone Bare Knuckle