Castle Williams

Castle Williams brings over 15 years of dedicated martial arts experience and a decade of coaching expertise to the Renegades program. A black belt in Hawaiian Kempo under legendary coach John Hackleman from The Pit, Castle blends old-school toughness with modern, technical precision.

As an athlete, Castle built an impressive competitive résumé. He holds a 7–1 amateur kickboxing record and a flawless 7–0 amateur MMA record, with six victories by KO or submission. He went on to claim the KOTC Featherweight Championship before turning professional, amassing a pro record at 4–3—all wins by stoppage. Castle is also a Bellator MMA veteran.

Throughout his career, Castle has trained with world-class teams, including Team Oyama, 10th Planet Jiu Jitsu Irvine, and 10th Planet Jiu Jitsu Las Vegas, sharpening a highly technical Dutch-style kickboxing approach rooted in fundamentals, timing, and clean mechanics.

As a coach, Castle is known for being welcoming to all levels—from beginners to fighters. His teaching philosophy centers on helping students build strong fundamentals while sharing the knowledge he’s gained through high-level experience. Whether the goal is fitness, self-defense, or competition, Castle brings patience, detail, and passion to every session.