Muay Thai - Head Coach
I first came to Adrenaline in 2009, and with life’s ups and downs, God still managed to keep me around here. The long-term plan overall was to gain experience so I could become a respected coach.
Through the years, with the help of Jose Medina, my B.J.J. Coach, Elliot Diaz, my wrestling coach, and Adam Rothweiler, my Muay Thai Coach, along with my training partners, I’ve managed to gain experience through fighting at both the amateur and professional levels. Even now, I’m still being coached by our very own Kenny Finister. I have been fortunate enough to have had great minds like these to learn from.
I've had my share of coaches who helped change my view on life and taught me what life’s really all about. Becoming the head coach of a program that I grew up in is such a blessing. The title of coach means a lot to me, but a wise teacher is always willing to learn, and humility is something I’ve learned most throughout this experience.
God has given me an opportunity to help change lives the way it was done for me—a way to give back by helping people not only learn the art of fighting but also overcome obstacles they once thought were impossible. I want people to leave my class with something they can take with them throughout life. I want those who once said, “I can’t,” to say, “I can.”
I was coached to win, and my coach was coached to win, so understand that I will coach to win. Not just win in the gym or ring, but to "WIN" in life—and that, to me, is way more important. I strive to help people build confidence, motivate them to achieve their goals, help them walk with their head held high, and be there for them in times of need, just as Adrenaline has been for me. This place has been like family to me, so it’s an honor to be able to coach this program and give back in the same way it was given to me.
How good God truly is to make this happen His way and with the only gym I’ve ever been a part of. God is good all the time. “Peace be with you.”


My name is Kenny Finister, and I have 24 years of experience in Muay Thai, including over 50 fights, training high-level fighters, and promoting events. I've worked with both amateur and professional boxers and have played a role in the growth of the sport.
Outside of martial arts, I'm a proud father, supportive brother, and enthusiastic mentor. I believe in the balance that the martial arts lifestyle brings. I also love cooking, exploring dishes from different cultures, and have a passion for music, having performed in genres like Roots Reggae, Jazz, Blues, and Samba Reggae. One of my lesser-known interests is reading about law. My goal is to inspire others to reach their full potential and thrive.
Muay Thai Coach
Coach Megan brings over 13 years of experience in the sport of kickboxing to Adrenaline, where she has served as a coach for the past 11 years. With a background as an amateur fighter and a public school teacher by day, Megan offers a unique perspective to her coaching approach. Her multifaceted roles demonstrate her unwavering commitment to both education and martial arts, making her a valuable asset to Adrenaline Martial Arts & Fitness.

Adult Boxing Instructor - Head Boxing Coach
Coach Freddie Barrera is a seasoned professional boxer and Head Boxing Coach at Adrenaline MMA & Fitness. With years of experience inside the ring, Freddie brings expert knowledge and a passion for teaching to boxers of all levels.
Whether you’re stepping onto the mat for the first time or preparing for competition, Coach Freddie’s training style blends technical precision, conditioning, and strategy to help students reach their full potential. His coaching goes beyond skill development — fostering confidence, discipline, and a love for the sport.
Join Coach Freddie at Adrenaline and experience a training environment built on professional insight and community-driven support.
Kids, Pre-Teens and Teens Boxing Coach
Boxing Coach Fernando Alamilla brings enthusiasm and dedication to Adrenaline MMA & Fitness. With a background rooted in boxing and over 12 years experience coaching students, amateur and professional boxers. Fernando is committed to fostering a positive and empowering environment for kids and teens. Adolescents need discipline, self respect, and confidence. Boxing prepares them to adapt to changing environments and help deal with physical and mental challenges. Whether it’s to handle bullying, self defense, lose weight, or become an amateur or professional fighter. Fernando can help you get started on your journey. He is USA Boxing licensed and SafeSport certified. Join Coach Fernando's sessions to experience a unique blend of skill-building, fitness, and mentorship, as he guides young athletes toward reaching their boxing goals. He believes Boxing is not only a sport, it’s a lifestyle.
Discover the transformative power of boxing with Coach Fernando Alamilla.
Adult Boxing Coach
Join us for boxing lessons with Coach Nestor, a dedicated boxing coach with extensive experience, located in San Bernardino. Coach Nestor brings years of knowledge from both training and teaching, providing expert advice to boxers of all ages and skill levels. Whether you're picking up gloves for the first time or looking to improve your technique, his teaching style is designed to help you progress in your boxing journey. Training takes place at Adrenaline MMA & Fitness, where Coach Nestor's focus on skill development and a supportive atmosphere makes it the perfect place for both young students and adults to learn and grow.

Coach Gary Butts is the Head Judo and Grappling Coach at
Adrenaline Martial Arts & Fitness, LLC in San Bernardino, CA.
A Gulf War Marine Corps veteran and retired Los Angeles County Deputy Sheriff with 32 years of service,
Gary combines military discipline, law enforcement expertise, and over 40 years of martial arts experience
to deliver world-class instruction.
Gary is a 5th Degree Judo Black Belt, five-time Masters National Judo Champion, and former national and international competitor.
He is also an All-Marine Corps Wrestling Champion, high school state wrestling champion, and four-time Junior National Sambo Champion.
With more than 35 years as a Judo instructor and international coach, Gary has trained over 50 national and international champions
in Judo and grappling.
At Adrenaline Martial Arts & Fitness, located at:
1465 S D St Suite 100, San Bernardino, CA 92408
Gary teaches Judo, wrestling, and MMA grappling to students of all ages and skill levels.
His classes emphasize technique, strength, and confidence while fostering a safe and supportive training environment.
Serving San Bernardino and nearby communities like
Colton, Rialto, Redlands, Fontana, Riverside, Highland, Loma Linda, and Grand Terrace,
Coach Gary helps students achieve their goals — from self-defense and fitness to competition at the highest level.
Call (888) 423-2496 to start training with Coach Gary Butts today.
Professor Jose Medina is a 1st Degree Black Belt in Brazilian Jiu-Jitsu
and one of the lead instructors at
Adrenaline Martial Arts & Fitness, LLC in San Bernardino, CA.
With years of dedicated training and competition experience, Jose brings technical precision, discipline,
and a passion for teaching to every class.
His instruction covers both Gi and No-Gi Jiu-Jitsu, with an emphasis on practical self-defense,
competition preparation, and personal growth. Students of all ages and skill levels benefit from his structured approach,
supportive coaching style, and attention to detail on the mat.
Based at our training facility at:
1465 S D St Suite 100, San Bernardino, CA 92408
Professor Jose serves the communities of
San Bernardino, Colton, Rialto, Redlands, Fontana, Riverside, Highland, Loma Linda, and Grand Terrace.
Call (888) 423-2496 to train under Professor Jose Medina and take your Jiu-Jitsu to the next level.


Jiu-Jitsu GI & NOGI Instructor
Introducing Christopher Ortiz, a dedicated Jiu-Jitsu Coach at Adrenaline MMA & Fitness in San Bernardino. With 5 years of coaching experience and a remarkable 3rd Degree Blue Belt earned under the guidance of Coach Jose Medina & Professor Thomas Cronin, Ortiz is committed to guiding individuals, especially young kids, through their Jiu-Jitsu journey. Starting his career with Adrenaline, Ortiz has a profound passion for coaching, as he believes it's an honorable privilege to witness young kids reach different levels of their potential. Join Coach Ortiz's classes for a transformative experience where you not only learn effective techniques but also cultivate confidence and discipline. Embark on a journey of self-discovery and skill enhancement with a coach who is passionate about making a positive impact on your life.
"Coaching to me is honorable because I have the privilege to see young kids reach different levels of their potential. It's amazing to see these kids grow into fearless individuals and to be able have a positive impact in their journey of life."
NO-GI Kids Jiu-Jitsu Instructor
Introducing Assistant No-Gi Kids Jiu-Jitsu Coach Michael Salinas, a dedicated and passionate instructor at Adrenaline MMA & Fitness. With a genuine love for the art of Jiu-Jitsu, Michael brings his expertise and enthusiasm to the young practitioners on their martial arts journey. As an integral part of our coaching team, Michael focuses on creating a positive and nurturing environment, where kids not only learn valuable self-defense skills but also develop discipline, confidence, and a love for the art. Join Coach Michael Salinas in the exciting world of No Gi Kids Jiu-Jitsu at Adrenaline, where every child's potential is nurtured and celebrated.


Muay Thai Instructor
Coach Mikey Guzman, boasting a flawless 2-0 record as a professional boxer, has dedicated five years to coaching at Adrenaline. Drawing from seven years of combat experience and a stellar teaching career, Coach Mikey brings a wealth of knowledge to his classes. Regardless of skill level, students can expect a comprehensive Muay Thai experience in Guzman's classes at Adrenaline MMA & Fitness. Embrace the art of Muay Thai, unleash your potential, and master cutting-edge techniques under the guidance of a coach who fosters success both inside and beyond the ring.
Kids Wrestling Coach and Muay Thai Instructor


Coach Johnny Foster began wrestling at age 15 at Bloomington High School under coaches Gabriel Schafer and Oscar Briseño.
In just three years, he became a standout competitor, earning titles as a
two-time league champion, San Bernardino County Champion,
CIF Individual Champion, and four-time CIF Dual Team Champion.
Johnny also placed 3rd at CIF individuals as a junior, 10th at Masters, and earned state recognition throughout his high school career.
After graduation, Johnny transitioned into coaching at Carter High School, where he helped lead the team to another CIF Dual Championship
alongside Coaches Hennessy and Lope. At just 19 years old, he became the
Head Wrestling Coach at Adrenaline Martial Arts & Fitness, guiding students in both fundamentals and competitive development.
Johnny later stepped away to pursue his own amateur MMA career and professional goals outside of sports, but his passion for wrestling
brought him back to Adrenaline — this time as Head Wrestling Coach once again.
With years of competitive and coaching experience, Johnny is dedicated to sharing his knowledge and motivating every student who
steps on the mat to reach their full potential.
Train with Coach Johnny Foster at
Adrenaline Martial Arts & Fitness, 1465 S D St Suite 100, San Bernardino, CA 92408
, serving the Inland Empire including
Colton, Rialto, Redlands, Fontana, Riverside, Highland, Loma Linda, and Grand Terrace.
Call (888) 423-2496 to start your wrestling journey today.