Juan Rivera is a professional wrestler He began his career in the World Wrestling Council where he won the WWC Universal Heavyweight Championship During the midtolate 1990s Rivera was an active wrestler in theWorld Wrestling Federation WWF initially performing under the ring name Kwang He was later renamed Savio Vega eventually becoming the leader of a Puerto Rican stable Los Boricuas Vega gave Stone Cold Steve Austin and Dwayne The Rock Johnson their first singles losses in the WWF During his feud with Austin he was the first recipient of the Stone Cold Stunner During his WWF run he defeated several highprofile wrestlers including Hunter Hearst Helmsley Jeff Jarrett Bradshaw and Yokozuna After leaving the WWF Rivera returned to Puerto Rico and joined Victor Quiñones promotion the International Wrestling Association serving as a longtime General Manager and winning five titles including the IWA Undisputed World Heavyweight Championship In 2011 he was featured in an interpromotional angle between IWA and WWC the first of its kind since both had coexisted He won titles in Latin America in promotions such as Panamas Revolution XTreme Wrestling the Dominican Republics Dominican Wrestling Entertainment and Ecuadors Wrestling Alliance Revolution Rivera has worked as a wrestling trainer and road agent for Total Nonstop Action and Ring Ka King