Full Name:
Zac O’Brien
Age:
24
Where were you born:
Sydney
Where do you live:
Gold Coast
Which gym do you train out of:
CMBT / Bangtao
Who are your coaches:
Miles Muecke, Jesse Yada, Brentin Mumford
What belts or rankings do you currently possess as a martial artist:
White belt
What sports or activities did you participate in growing up:
Rugby League & Union for 10+ years
When did you begin to take MMA seriously as a hobby and then as a potential profession:
I’d say 2024, when I moved to Bangtao, was the real turning point between being a hobbyist and becoming a professional. I know I’ve had an amateur fight since then, but mentally I’ve been all-in as a pro since Bangtao. Training alongside the pros at CMBT since last November—guys like Tasar, Yusuke and the rest—has only solidified that professional mindset even more.
Favourite aspect of training or favourite session of the week, and why:
Sparring. This session allows me to flow and express myself while being tested under similar fight intensity. The feeling of accomplishment is amazing.
What are your greatest strengths as an athlete or a fighter:
My creativity and commitment to the grind. It’s as simple as that.
How would you describe your fighting style:
Aggressive yet calculated. Day by day I’m becoming more of a well-rounded Mixed Martial Heartist.
What is your favourite sport and why:
Muay Thai + MMA. Since starting mixed martial arts, nothing else really interests me apart from surfing and yoga.
Who is your favourite athlete:
Volk
Who is your favourite combat sports athlete:
Right now, Marcio Ruffy.
What are your immediate and long term goals:
I’m different to most fighters. I’m just taking it one fight at a time—using each fight camp more as a ‘becoming’ than a preparation.
When fans see your name on a fight poster, what should they expect:
An entertaining performance from the walkout to the post-KO celebration.
How do you see your upcoming fight playing out:
A professional yet patient masterclass. I will find my range then find the finish. It’s become abundantly clear that when I land, it’s lights out—so there’s no need to rush.
A final message to any friends, family and supporters:
I love everyone that’s shown me support from the start of this journey until now. It hasn’t been an easy trot, but having the real ones by my side—experiencing the highs and lows—has really made a positive impact. When I’m up on that cage post-fight, I’ll be feeling your energy, whether it’s from Sydney, Phuket, or in the crowd.
Where will any fans or supporters be able to find you socials:
Instagram: @zzacobrienn
TikTok: @zacobrien
Watch Zac O’Brien fight at Eternal MMA 98 on Saturday, September 13
