in the '50s and '60s, mayehoff became well-known as a spokesman for "falstaff beer"..he performed as the voice of a cartoon character known as "the old pro"..in character (which had the same personality he portrayed as 'mr. jackson' in the film, "that's my boy!"), he encouraged "elwood", who never spoke, as the object of "the old pro's" advice about improving his performance as a professional athlete..the commercial usually ended with the comment, "falstaff..that's my beer!"
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