Jason Rau is a professional grappler and a black belt in jiu-jitsu under Matt Serra, who also worked extensively with John Danaher at the famous Blue Basement training facility (Renzo Gracie Academy NYC). Rau gained notoriety in the sport while competing mainly in the American East Coast submission-only circuit, with notable wins over PJ Barch, Josh Hayden, Victor Silvério, Mansher Khera and more.