Jocko Willink is an author, black belt in Brazilian jiu jitsu, and retired commander of the most highly decorated special-operations unit of the Iraq War: US Navy SEAL Team Three Task Unit B... Read allJocko Willink is an author, black belt in Brazilian jiu jitsu, and retired commander of the most highly decorated special-operations unit of the Iraq War: US Navy SEAL Team Three Task Unit Bruiser.Jocko Willink is an author, black belt in Brazilian jiu jitsu, and retired commander of the most highly decorated special-operations unit of the Iraq War: US Navy SEAL Team Three Task Unit Bruiser.