Complex sentence: He is an expert in combatives, Krav Maga, kickboxing classical ju-jitsu and Brazilian Jiu-Jitsu and competes professionally with the North American Grappling Association (NAGA).
Split into simpler sentences: He is an expert in combatives, Krav Maga, kickboxing classical ju-jitsu and Brazilian Jiu-Jitsu. Hall competes professionally in martial arts with the North American Grappling Association (NAGA).