John appeared in many movies such as True Grit with John Wayne and The Odd Couple with Jack Lemmon and Walter Matthau. Fiedler also appeared on television shows such as Cheers and The Bob Newhart Show.
On June 25th, 2005, John Fiedler died at the Lillian Booth Actors' Home in Englewood New Jersey at the age of 80. John had finished recording his lines for Piglet in Pooh's Heffalump Movie, which was released in February 2005, just 4 months before his death and he had reprised his role as Piglet for the direct-to-video sequel Pooh's Heffalump Halloween Movie, but died before he could finish all his lines, to which Travis Oates (Piglet's current voice actor) recorded. John was never married and was survived by his brother James Fiedler and sister Mary Fiedler-Dean. John's Winnie the Pooh co-star Paul Winchell died the day before he did on June 24th, 2005.