Tony Pacenski began his Brazilian Jiu-Jitsu journey in his teenage years, building his foundation under some of the most respected figures in the sport's history. A pivotal chapter in his development came during two years spent in the Gracie Jiu-Jitsu instructor program in Torrance, California, where he trained alongside Rorion Gracie and three-time UFC tournament champion Royce Gracie — winner of UFC 1, UFC 2, and UFC 4. During this period, Pacenski assisted in seminars and training sessions delivered to some of the most demanding audiences imaginable, including the FBI, Navy SEALs, Army Rangers, and the Los Angeles Police Department, as well as community-focused programs for women and children.
Among the most formative experiences of his time at the Torrance academy was the rare opportunity to train semi-privately with Grand Master Helio Gracie during his visits to the facility. These sessions gave Pacenski direct access to the foundational philosophy of one of Jiu-Jitsu's founding figures — an experience that left a lasting imprint on his understanding of the art. In October 2006, Pacenski earned his black belt under Rodrigo Medeiros, completing a developmental path that drew from multiple pillars of the Gracie lineage and positioned him as both a skilled practitioner and a deeply educated one.