In four days , she makes her MMA debut in Lake Charles , Louisiana at Legacy FC 58 .
She 's only 23 - years - old , but BJJ world champion MacKenzie Dern ( 0 - 0 - 0 ) is ready to step into the cage .
In four days , MacKenzie Dern makes MacKenzie Dern 's MMA debut in Lake Charles , Louisiana at Legacy FC 58 .
She 's only 23 - years - old , but BJJ world champion MacKenzie Dern ( 0 - 0 - 0 ) is ready to step into the cage .