Siege Mixed Martial Arts & Fitness (MMA)
About
Siege Mixed Martial Arts & Fitness in Phoenix offers comprehensive training in MMA and Muay Thai disciplines, supported by a team of accomplished instructors. The coaching staff includes world-class practitioners such as Head Muay Thai Instructor Adrien Grotte, a Thai Boxing Association World Champion with a 15-1 record, and Brazilian Jiu-Jitsu Instructor Kamuela Kirk, an IBJJF world champion and UFC fighter. With additional expertise from Head MMA Instructor Santino, a 2nd degree BJJ black belt and former professional fighter, and specialized kids programs led by instructors like Shea Kirk and Pat, the gym provides structured classes for all skill levels, from beginners to serious competitors.
reviewsWhat Members Say
Members praise the gym for its world-class coaching, noting that instructors like Coach Gabe, Pat, and Shae are knowledgeable and take time to teach proper technique. They describe a welcoming, family-like atmosphere where people of good character create a supportive community. Many mention the gym feeling like a second home, with clean facilities and classes that are challenging yet accessible to all skill levels. Specific coaches are frequently highlighted for their expertise and caring approach, contributing to an environment where members look forward to training daily.
rate_reviewGoogle Reviews (5)
Jenifer Venegas
9 months ago
They say it takes a village to raise a child & I’ve found mines. 40 minute daily drive to surround my kids by humble, God centered, welcoming , loving, warriors. Worth it. So worth it. No place has ever felt more like home than this gym. The fitness class is the most fun community I’ve ever been a part of & the Jiujitsu classes & trainers are unmatched. If you’re looking for a place to get your body & mind right ... It’s here.
Meg Sanchez
5 months ago
I have been training at Siege for 2 years now & it’s become a second-home & a second-family for me♥️. The gym is clean, the coaches are knowledgeable & it’s full of people of good character! If you’re thinking about trying out Jiu Jitsu or another martial art, Siege MMA will make you feel welcome & meet you where you’re at.
Cristian Castellanos
5 months ago
I’ve been training Brazilian jiu-jitsu about four months now and I’m learning pretty quick. Also the coaching is amazing. Big shout out to Coach Gabe, Pat and Shae
Jonathan Kerr
a month ago
The coaches here are great. Family atmosphere. Friendly to all skill levels. Do recommend to anyone curious.
William O'Brien
9 months ago
⭐️⭐️⭐️⭐️⭐️ An Outstanding Gym with World-Class Coaching Siege MMA is truly next-level. From the moment you walk in, the energy, professionalism, and passion from the coaches is undeniable. Whether you’re just getting started or have years of experience, the classes are structured, challenging, and incredibly well-coached. The instructors don’t just show up—they care. They take the time to teach proper technique, push you at the right pace, and help you grow in strength, skill, and confidence. The atmosphere is focused but welcoming, and the camaraderie between members makes it a place you actually look forward to showing up to every day. Whether you’re looking to compete, train seriously, or just get in the best shape of your life, Siege MMA delivers. Can’t recommend it highly enough.
Contact
14131 Rio Vista Blvd Ste #13, Peoria, AZ 85381, USA
scheduleHours
Monday: 10:30 AM – 1:00 PM, 4:30 – 8:30 PM
Tuesday: 4:30 – 8:30 PM
Wednesday: 10:30 AM – 1:00 PM, 4:30 – 8:30 PM
Thursday: 4:30 – 8:30 PM
Friday: 10:30 AM – 1:00 PM, 4:30 – 7:30 PM
Saturday: 9:00 AM – 12:00 PM
Sunday: Closed
groupCoaches & Instructors
Adrien Grotte
Head Muay Thai Instructor
Thai Boxing Association World Champion, 15-1 (11 KOs) record
Began kickboxing in 1988. Won AZ State title. Defeated Yi Long. Teaches Muay Thai on Tuesday nights.
Shea Kirk
Kids Brazilian Jiu-Jitsu Instructor
BJJ brown belt, world champion
Head coach of the Kid's BJJ program and the 11AM BJJ classes.
Ben
Boxing Coach
Amateur boxer
Coaches kids boxing and 11AM adult boxing classes on Monday/Wednesday/Friday. Also trains Muay Thai and BJJ.
Kamuela Kirk
Brazilian Jiu-Jitsu Instructor
BJJ black belt, IBJJF world champion, UFC fighter
Began training at age four. Former head coach of Siege kids program. Coaches adult BJJ on Tuesday/Thursday nights.
Niko
Muay Thai / Kids Muay Thai Instructor
Started with wrestling, later trained in no-gi BJJ and Muay Thai. Traveled to Thailand. Coaches Wednesday night and Saturday morning Muay Thai.
Santino
Head MMA Instructor
2nd degree BJJ black belt, former professional fighter
Trained UFC champion Henry Cejudo and other pros. Teaches no-gi classes. Former college English teacher. With Siege since 2013.
Pat
Assistant Kids Instructor
BJJ brown belt
Helps build the kids Brazilian Jiu Jitsu team.