Eddie Alvarez was hardened at an early age, often getting into street fights in Philadelphia, Pennsylvania as a means of self-defense. After falling in with the wrong crew, Alvarez would eventually find a better way, using mixed martial arts competition as an outlet for his physicality before embarking on a World Championship quest that took him all around the world. “The Underground King” writes the latest chapter of his real-life “Rocky” story at ONE: A NEW ERA in Tokyo.