César Cuauhtémoc González Barrón (9 January 1968 – 11 May 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 posthumously inducted into 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, King collapsed in the ring and died a short time apparently from a heart attack at the age of 51. Following his death, his body delayed to be repatriated from London to Mexico. His body firstly arrived to Mexico City on 18 Saturday and being there it was moved to Monterrey and later by land to Torreón, Coahuila his natal city, there his funeral was held at the Funeraria Gayosso where fans were able to attend and he was later buried at the panteón Jardines del Tiempo in Torreón alongside his father. An autopsy confirmed that King's cause of death was due to a fulminant infarction and that he had not taken any drugs or medications.
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.