Herbert Alan Gerwig (April 26, 1931 – November 10, 2011) was an American professional wrestler, better known by his ring name of Killer Karl Kox, who competed in the National Wrestling Alliance as well as international promotions such as All Japan Pro Wrestling, the International Wrestling Alliance and World Championship Wrestling during the 1960s and 1970s.
Rumors were that in 1957, Kox earned the name, Killer, when he performed his famous finishing move, the brainbuster, on his opponent by holding him upside down for a period of time and allowing the blood to rush to the brain.