One of the most popular and accomplished female jiu-jitsu black belts, Mackenzie Dern, is getting ready for her MMA debut.



Dern will fight on Legacy FC 58 on July 22 in Louisiana. Her in-ring debut will a 115lb match against fellow first-timer Kenia Rosas.



The jiu-jitsu world champion has been working on her striking skills at MMA Lab, a gym in her hometown of Phoenix, Arizona that is home to former UFC champion Benson Henderson.



This video is from when we recorded the documentary 'True Warrior', which you can watch here on FloGrappling.











