César Cuauhtémoc González Barrón (January 9, 1968 – May 11, 2019) was a Mexican luchador enmascarado (masked wrestler) and actor. He was known best as Silver King, but also had an extensive stint as Black Tiger III, the third incarnation of the Black Tiger character. He was the son of luchador Dr. Wagner and the brother of Dr. Wagner Jr. González worked for many years with El Texano as the tag team "Los Cowboys," winning tag team championships in both Mexico and Japan.
González worked for the Universal Wrestling Association (UWA), Consejo Mundial de Lucha Libre (CMLL), Lucha Libre AAA World Wide (AAA), World Championship Wrestling (WCW), All Japan Pro Wrestling (AJPW), New Japan Pro Wrestling (NJPW) and various smaller federations all over the world. González also starred as the villain "Ramses" in the movie Nacho Libre, starring Jack Black. In June 2010, González began using the ring name Silver Cain/Silver Kain when wrestling in Mexico City as a way to be able to officially be allowed to wear his mask again. In 2019, he was inducteed in the AAA Hall of Fame.
He is also known as El Bronco, Black Tiger III and Silver Cain.
During a match in Camden Town, London, England, against Juventud Guerrera on 11 May 2019, González collapsed in the ring and died a short time after from a heart attack. After his death, it was reported Daniel "El Satanico" Lopez, who runs the commission in Zapopan in Guadalajara, ruled that shows held in that state need two ambulances on site, one paramedic, one doctor and the referees has to know CPR.