Dark Horse Combat Club


At Dark Horse Combat Club we are a family, and our school is bound to become our students’ second home. We are a judgment-free zone, where mistakes are viewed as growth opportunities and your instructors and fellow students are your #1 supporters. You’ll learn a lot of impressive skills and gain many new abilities at Dark Horse Combat Club, but the most important thing you’ll acquire during your time here? Our community.

Dark Horse Combat Club


Here Dark Horse Combat Club, our staff is the secret to our student success. Each instructor has a rich background in martial arts and is eager to train the next generation of martial artists. Meet the team below!

Owner, Head Instructor

Andrew "The Dude" Dudderar

Professor Andrew Dudderar is a Brazilian Jiu Jitsu Black Belt under Amal Easton of Easton Brazilian Jiu-Jitsu. He is known for being impervious to chokes and for having a strong focus on the mental aspects of training. Despite his intimidating appearance, Andrew has a sincere and inspiring love for helping others achieve their goals in Jiu-Jitsu, and quickly became one of the most beloved teachers in the local community.

Andrew wrestled in high school before going on to play college football. He started training Brazilian Jiu-Jitsu in 1999 under the venerable Rafael Lovato Sr. He moved to Boulder in 2000, and began training with Amal Easton in 2001. After receiving his bachelors degree in Psychology from CU, Andrew moved to Rio De Janeiro, Brazil to live and train at the birthplace of the martial art for two years. Andrew then received his brown belt from the Gracie Barra patriarch, Carlos Gracie Jr. and his black belt from Amal Easton.

Lineage: Mitsuyo Maeda – Carlos Gracie Sr – Carlos Gracie Jr – Helio Soneca

Highlights of his competition record include:

  • 2012 Master’s World Championships 3rd Place (Black Belt)
  • 2008 World Championships 3rd Place (Brown Belt)
  • 2005 Pan American Championship 2nd Place (Blue Belt)

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Head Coach & Professor

Eric “Cobra” Coe

F2W Pro’s Former Brown Belt 170lb Champion, Professor Eric Coe began training in the art of Brazilian Jiu-Jitsu in 2011 at Dark Horse BJJ, and never looked back. He started competing after three months of training and preparing for competitions has become a major focus of his Jiu-Jitsu career. His other passion is teaching, sharing love for the art with children and adults alike. In 2013 he placed 3rd in the Pan American games in the blue belt lightweight division, the highlight of his competition record so far. Professor Eric has also taken countless gold and silver medals in local promotions. Eric was promoted to black belt in September 2021 and started his career as professor in the same month!

Professor Eric likes working out when he’s not on the mats.

Favorite Submission: Triangle

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General Manager & Coach

Phillip Tearse

Phill started training Jiujitsu in 2016 at the age of 31 in Oakland, CA.  He attained his blue belt under Adam Lowry (Tom Knox, Cleber Luciano) in late 2017.  He then moved to Denver in early 2021 and started training at Dark Horse Denver, being awarded his purple belt in Oct 2021.  He also has been a rock climber for the past 14 years, enjoys playing hockey, and snowboarding.  His favorite submissions are the cross collar choke and triangle.

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Striking & MMA coach

Dave Tamarchenko

David has been the head Muay Thai and MMA coach with Dark Horse Brazilian Jiu-Jitsu since its inception in 2010. He has been training in various martial arts ever since “Ninja Turtles” and “The Karate Kid”. As a child and teenager, he studied Kenpo Karate, Wah Lum Kung Fu, Yin Style Tai Chi, and Capoeira Angola.

In 2003, he began training in Brazilian Jiu-Jitsu under Prof. Amal Easton and Muay Thai under professional fighter Cruz “The Saint” Chacon in Boulder CO. He received his blue belt from Erwin Lopez at Tri Town BJJ and his purple belt from Prof. Andrew Dudderar in 2019. He also has refined his striking skills under Prof. Duane Ludwig of Bang Muay Thai in Westminster, CO.

David has taught and coached Muay Thai at Brazilian Jiu-Jitsu of Boulder (Easton), the Colorado Athletic Club in Boulder, and Jab Boxing Gym in Westminster, CO. He has also been a licensed Muay Thai and MMA cornerman under the Colorado State Boxing Commission since 2012.

In recent years, David has developed a specialized focus on the application of Brazilian Jiu-Jitsu and MMA principles for self-defense in a weapons based context for civilians, security professionals, and law enforcement personnel.

“My favorite thing about armbars, is triangles, and my favorite thing about triangles, is armbars”- David Tamarchenko

“The true science of martial arts means practicing them in such a way that they will be useful at any time, and to teach them in such a way that they will be useful in all things.”-Miyamoto Musashi

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Fundamentals Instructor

Thiago Leao

Coach & Orientation Instructor

Lucas Hennessey

Lucas started his Brazilian Jiu-Jitsu journey in 2017 at Rochester Phoenix Martial Arts under Jason Eggleston. He’s been with us since September of 2019 and received his blue belt Winter of 2020, and purple belt in spring 2022. He’s always had a knack for teaching and showing new folks the ropes. We knew he’d be a great candidate to help us coach some orientation classes and cover class when necessary. His favorite submission is the Sliding Collar Choke and his favorite thing about Brazilian Jiu-Jitsu is learning self defense against bigger opponents and learning the resilience required to not give up in bad positions.

Off the mats he enjoys camping, playing music and going to concerts.

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Head Youth Coach & Women's Class Instructor

Arianna Gracia

At 17, Arianna started Jiu-Jitsu in Tucson, Arizona when she was tasked with cleaning her uncle’s academy twice a day as a grounding punishment. She was intrigued by the discipline that the sport imposed and hopped on the mats. She moved out to Denver in 2019 and has been training at Dark Horse Combat Club since then. Off the mats Arianna enjoys hiking dogs, reading, and practicing yoga.

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