Central Montana Martial Arts

Meet the Instructor

Coach Clint Mrnak (center) brings a lifelong commitment to competition, discipline, and athletic development. He is a multiple-time state wrestling placer, state runner up, and National All-American getting 3rd place at Nationals.

Clint built a strong foundation in elite-level grappling that continues to shape his coaching philosophy. He holds an undefeated amateur MMA record later transitioning to the professional ranks, competing with PoundEmPro Productions and Impact Fighting Championship. As a professional mixed martial artist, Clint complied a 7-4 record facing high level regional competition while continuing to refine his skillset.

Beyond boxing, Clint has coached at the JH and HS wrestling levels, emphasizing fundamentals, mental toughness, and accountability. Since 2023, he has served as head coach at Central Montana Martial Arts. Leading athletes of all experience levels in wrestling, BJJ, and MMA.

Coach Clint’s approach centers on disciplined training, strong fundamentals, and building confidence that carries beyond the mat or cage.

  • Every Tuesday night at 6:30

    Drop In Price: $20

  • Every Thursday night at 6:30

    Drop-in Price: $15

  • $100/Month

    Tuesday CMMA Coached Classes

    Thursday CMMA Open Mat

    Gym Membership to Lions Den

    Supplemental Training Access at Grindhouse and Affiliated Schools

    Free Seminars held at CMMA and Grindhouse

    Access to Room during Gym Hours

    Coaching Support at Tournaments & Events

  • Blackbelt Seminar

    11-2pm in Billings, MT

    FREE for all GrindHouse Members & Affiliates