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Rounders MMA Fullerton
Train with the best in a supportive community—from beginners to champions.
5(5 reviews)
$$
doctor
martial-arts
gyms
Expert-led BJJ training for all levels, focusing on technique, ground work, and self-defense.
High-energy striking classes that improve fitness, coordination, and combat skills.
Comprehensive training combining striking and grappling for competition or personal growth.
Introductory classes and free trials to help newcomers learn fundamentals in a supportive setting.
Age-appropriate training for kids and teens, building discipline, confidence, and athleticism.
One-on-one sessions with experienced coaches for tailored skill development and goal achievement.
Train with the best in a supportive community—from beginners to champions.
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Rounders MMA Fullerton is a premier martial arts gym offering expert training in a variety of disciplines, including Brazilian Jiu-Jitsu, Muay Thai, kickboxing, and mixed martial arts. Led by experienced coaches like owner Joe Kim, we provide a safe, welcoming environment for students of all ages and skill levels. Whether you're looking to compete, get in shape, or learn self-defense, our structured classes and supportive community help you achieve your goals with confidence and skill.
Rounders is a hidden gem in Fullerton, offering a great variety of martial arts—from kickboxing to BJJ. Joe, the owner, is incredibly kind and welcoming, with an exceptional ability to coach students of all ages and experience levels. I’ve also had the chance to attend noon BJJ classes with Professor Danny and always leave feeling more skilled and confident. Overall, Rounders provides a safe, supportive, and effective environment to learn and train martial arts.
Rounders MMA is the real deal. Whether you’re looking to compete, get in shape, or learn real self-defense, this gym delivers. The coaches are experienced, motivating, and genuinely care about your progress. The atmosphere is intense but welcoming—everyone pushes each other to get better every day. Classes are well-structured, with solid technique, hard training, and a strong team vibe. Easily one of the top MMA gyms around.
Great gym and community. I've been going to Muay Thai classes consistently since January, and the environment is extremely supportive. The coaches are highly experienced and provide extensive feedback. Working with other members is also a great experience. Overall, the gym has had a very positive effect on my health and well-being. 10/10 would recommend!
My son attended this gym from 2020-2021 and it was the best experience of his life. We cannot even begin to show our deepest gratitude and respect for all the coaches that trained with him. Coach Joe Kim believed in him so much that on his last day before we moved to Florida he told my wife to please keep him in a gym training because he saw potential. On March 30th my son, Douglas Bigler, now 19 won his first kick boxing amateur fight in Clearwater Florida. Coach Joe…thank you for all that you did for our son! His passion for this sport started in your gym and we are eternally grateful.
I love this gym. If you were ever curious about learning the fundamentals of boxing, kick boxing, jujitsu, and more Rounders is the place for you. Coach Joe has created at atmosphere that is not only friendly, welcoming and positive but also motivating. With each class I have taken I can honestly say I learn something new everytime. You can try the first class for free. So trust me me when I say you won't regret coming and trying out Rounders mma gym!
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