belt in Judo . [3]   Rodrigo Gracie Rodrigo is the son of Jiu-Jitsu Grandmaster Reylson Gracie and grandson of one of the founders of Gracie Jiu-Jitsu , Carlos Gracie . [3] Rodrigo began training Jiu-Jitsu at the age of 14 and was awarded the black belt at the age of 18