Tracking the championship: UFC women’s strawweight division
Carla Esparza
Credit: Invicta FC
In Season 20 of "The Ultimate Fighter," the first season to feature all female fighters, Esparza defeated Rose Namajunas in the final to win the season and be crowned the UFC's inaugural champion of the new 115-pound strawweight division on Dec. 12, 2014.
Joanna Jedrzejczyk
Credit: Getty Images / Ronald Martinez
Successful title defenses: 5.
Joanna Jedrzejczyk stopped Carla Esparza, who was making her first title defense, in the second round via TKO at UFC 185 on March 14, 2015 in Dallas. Jedrzejczyk, from Poland, defended her title successfully five times en route to becoming one of the pound-for-pound best fighters. She was 14-0 before losing to Rose Namajunas at UFC 217.
Rose Namajunas
Credit: Mario Gonzalez
Rose Namajunas celebrates her first-round knockout for the upset win over Joanna Jedrzejczyk to win the strawweight title at UFC 217 at Madison Square Garden on Nov. 4, 2017.