John Patrick Michael "Pat" McMahon is an American actor and broadcaster, best known for his portrayal of numerous characters on The Wallace and Ladmo Show, a daily children's variety show broadcast on KPHO-TV in Phoenix. His most well known role from the show was the bratty Gerald, calling fans of the show “public school brats” when in character. McMahon is also a longstanding fixture on the Phoenix broadcasting scene, where he has worked at KRIZ, KOY, and KTAR radio stations—serving as program director, disc jockey, and talk-show host, among other positions.
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