Video: Watch Mackenzie Dern Earn Unanimous Verdict vs. Katherine Roy at LFA 6

Mackenzie Dern will make her fourth mixed martial arts appearance ? and first at 125 pounds ? when she faces Mandy Polk at Legacy Fighting Alliance 24.

Before Dern returns to the cage at Comerica Theatre in Phoenix on Oct. 13, take a look back at her unanimous decision triumph over Katherine Roy at LFA 6 on March 10. That victory improved the 24-year-old MMA Lab product to 3-0 in her burgeoning professional career.

LFA 24 is headlined by a welterweight duel pitting Matthew Frincu against Curtis Millender and airs on AXS-TV at 9 p.m. ET/6 p.m. PT.