Donald Jay Rickles (May 8, 1926 – April 6, 2017) was an American stand-up comedian, actor, and author, known especially for his insult comedy. His film roles included Run Silent, Run Deep (1958) with Clark Gable and Kelly's Heroes (1970) with Clint Eastwood, and beginning in 1976 he enjoyed a two-year run starring in the NBC television sitcom...
more on Wikipedia