While Namajunas was five years old, she began practicing Taekwondo in Milwaukee, Wisconsin. At the age of 9, she earned her poom belt. After that, she started practicing both karate and jiu-jitsu. She was in her high school, she started training in kickboxing and mixed martial arts with Duke Roufus at Roufusport in Milwaukee, Wisconsin.
Later Namajunas started competing in MMA as an amateur. While competing in MMA, she made a record of 4-0 win 2 by TKO 2 by decision. Both of the finishes appeared in the first round. Presently, some of the popular martial artists of MMA players are Brock Lesner and Ariel Helwani.
Later Namajunas fight in Invicta Fighting Championship against Emily Kagan at Invicta FC 4: Esparza vs. Hyatt. While competing against Emily, Namajunas was able to secure the victory via submission because of a rear-naked choke in round three, which earned her the submission of the night bonus.
On April 5, 2013, Namajunas fight against, Kathina Catron at Invicta FC 5: Penne vs. Waterson. She won the match by submission of a flying armbar just within 12 seconds into the first round, which earned her a second Invicta submission of the night award.
Namajunas is an American by nationality and belong to Lithuanian ethnicity. She began dating her boyfriend as well as a training partner, Pat Barry. After dating some time, the couple got engaged. The couple has not any children, and they are yet to get married.
Rose Namajunas is one of the most popular faces of the mixed martial arts. She earns a praiseworthy salary from a professional career. According to some source, her net worth is estimated to be around $500 thousand dollars.