Joanna Jedrzejczyk had a 6-0 professional MMA record when she joined the UFC in 2014. Before she signed with the promotion, Jedrzejczyk spent several years competing in kickboxing and Muay Thai, where she won several world championships. It didn’t take Jedrzejczyk long to add the UFC strawweight title to her trophy case. She won that title in her third fight with the UFC. Jedrzejczyk would defend that title five times before dropping that title in 2017. The former champion retired on Saturday night after a knockout loss to Zhang Weili at UFC 275.
Jedrzejczyk never regained the title, but it wasn’t through lack of effort.