George Momberg (May 13, 1934 – August 24, 1995), better known by the ring name Killer Karl Krupp, was a Dutch-born professional wrestler famous during the 1970s and early 1980s.

[5] At the age of 16, he went to Canada and was involved in many sports, rowing and participating in amateur wrestling at the Hamilton Jewish Centre and in the local YMCA.

[4] While working for Stampede Wrestling in December 1971, Momberg hit upon the gimmick that would make him a star, the character of German heel, Killer Karl Krupp.

[2] The gimmick had been around a good twenty years by this time, first popularized by Hans Schmidt and carried further by later stars, such as Fritz von Erich.

With eyes bulging, a shaved head and short black beard framing a leering grin, Krupp represented a wildly cartoonish, yet frightening wrestling villain.