Greg Seal


Greg has been athletic his entire life, maintaining a passion for play and sport. From high school and college varsity athletics to weight training, running and biking, he began training Brazilian jiu-jitsu in his 40’s on the advice of his physician. He achieved his black belt under the legendary Machado brothers and has trained with many other world renowned BJJ legends. At Octagon, Greg plays an active role managing the programs and facility as well as teaching.

Octavio Couto

Brazilian Jiu-Jitsu Instructor

Octavio “Ratinho” Couto is a 5th degree Brazilian Jiu-Jitsu Black Belt and one of the most revered of all BJJ coaches in the world.  He won the Brazilian Nationals in 1994 and continued competing over the years, winning the World no-gi Championships Master Division thirteen years later.

Originally competing with Alliance, he was one of seven black belts to form Team Brasa in 2002.

Professor Couto has coached all over the world. Most recently he coached Fabrico Werdum to 2009 ADCC championship and silver at the 2011 ADCC.  Professor Couto Also coached and cornered Werdum in his historic victory over Fedor by triangle.  Besides Renato “Babalu” Sobral, he has coached many other Strikeforce and UFC fighters.

College educated and speaking four languages, Octavio developed principles of job duties, education and self defense for the Italian Carabinieri (police) using Brazilian Jiu-Jitsu.  He co-founded and developed the curriculum and operations at AKKE BJJ, the largest academy of Rio de Janiero.

Eric Schambari

MMA Coach

Coach Eric Schambari is a former mixed martial arts fighter and a Brazilian jiu-jitsu black belt.  He trains students at Octagon in no-gi jiu-jitsu and in MMA. The goal of the MMA class is to give the student a basic understanding of cage fighting and proper conditioning for the sport.

Eric has been training in jiu jitsu for the past fifteen years, receiving his black belt under Travis Lutter. He competed in jiu-jitsu and MMA having 22 cage fights amassing a 16 and 6 record.  He continues to compete in no-gi jiu jitsu.

Originally from Las Vegas, Coach Eric began training jiu jitsu with Mark Laimon. After training for six years he moved to Dallas and began training with Guy Mezger, compiling a 5-0 record under Guy. Following that, Eric moved to California to train with Joe “Daddy” Stevenson.  Four years ago Eric returned to Texas to reunite with his original coach Mark Laimon.  Coach Eric has brings many years of competition and training to his teaching at Octagon.

Coach Eric is available for private instruction in Brazilian jiu jitsu, boxing and personal training.  Contact Eric at the front desk at Octagon or

Xavier James

Kickboxing/Muay Thai Instructor

Xzavier began training martial arts at 8 years of age and has been training since.  He began with Shotokan karate and continued with Muay Boran, Brazilian jiu jitsu, Shoot Wrestling, Senshi Do-Kai, Muay Thai and MMA. At 23 years of age, he began studying  Kinesiology and was certified by the National Academy of Sports Medicine (NASM) in kinesiology. After becoming a certified personal trainer he received additional education and certifications in Corrective Exercise, Performance Enhancement and Fitness Nutrition. An avid learner, Xzavier later became certified in TRX training as well. 

Every year you will find Xzavier attending multiple fitness seminars and workshops. In addition to teaching and learning, Xzavier continues to train as a student in Brazilian Jiu-Jitsu and other martial arts and competes in grappling tournaments. Xzavier loves his work and his students affirm that his enthusiasm is contagious!