Judith's Who Is a Product of My Students

John Danaher is widely regarded as one of the most important Brazilian Jiu-Jitsu coaches of his generation.

John Danaher is a Brazilian Jiu-Jitsu (BJJ) black belt under Renzo Gracie and an instructor at Renzo’s academy in New York City, who is widely regarded by within the grappling community as one of the best coaches of his generation.

Praised by some of the prime figures in combat sports such as mixed martial arts (MMA) guru Greg Jackson and Jiu-Jitsu legend Vinícius Draculino for his knowledge and teaching capabilities, Danaher is best known for his work with athletes such as Georges Saint Pierre, Garry Tonon, Gordon Ryan and Eddie Cummings known among BJJ fans as the Danaher Death Squad (DDS).