In the late 1940s Disney put Walsh in charge of their television operations. While at Disney, Walsh also wrote gags for the ' Panchito' stories in the Silly Symphony comic strip (1944–45), and created the Uncle Remus and His Tales of Br'er Rabbit Sunday strip (1945–46). Walsh continued writing the gag strip until 1964, when he passed it on to Roy Williams. Walsh continued to write the daily strip for more than twenty years, partnering with artist Floyd Gottfredson on dozens of stories until 1955, when the strip changed formats to become a gag-a-day strip. Another recurring character created by Walsh is the bird Ellsworth who appeared as Mickey's sidekick in the strip's sunday pages where he became a major focus, sometimes stealing the show from Mickey. Notably, Walsh created Eega Beeva, an evolved man from the future who became one the strip's protagonists from 1947 to 1950, effectively replacing Goofy as Mickey's sidekick. Walsh's storylines could be darker and more violent than in the earlier strips, and introduced various bizarre characters. He had pizzaz.' Due to Walsh's lack of interest in Mickey as a character, and to his own taste for science fiction, mystery and horror, the stories he wrote for the strip quickly became very different from those of the previous decade. ' Mickey Mouse was very dull and kind of stupid,' Walsh later said. He joined the Disney company in 1943 as a press agent and began writing the Mickey Mouse comic strip as a sideline. He worked as a press agent for 15 years at the Ettinger Company and started writing jokes as a sideline on the suggestion of client Edgar Buchanan. Walsh then followed Stanwyck and Fay to Hollywood. They hired Walsh at $12 a week to rewrite the show, which went to Broadway where it ran for five weeks. While at UC, Walsh produced a freshman show that happened to be seen by Barbara Stanwyck and Frank Fay who were passing through town in a show, Tattle Tales. In 1934 he accepted a University of Cincinnati athletic scholarship. He played football at Purcell and wrote sports for the Cincinnati Commercial Tribune. He was raised in Cincinnati by his aunt and uncle, Agnes and William Newman. Walsh was born in 1913 to immigrant parents in New York. In 1970 an article in Variety listed him as the second most successful film producer of all time in terms of money-earning movies even though he was 'a guy no one's ever heard of'.

He died in Los Angeles and was interred in Glendale's Forest Lawn Memorial Park Cemetery. He also wrote the Mickey Mouse comic strip for more than two decades.

For his work on Mary Poppins, he shared Academy Award nominations for Best Picture with Walt Disney, and for Best Writing, Screenplay Based on Material from Another Medium with Don DaGradi. William Crozier Walsh (Septem– January 27, 1975) was a film producer, screenwriter and comics writer who primarily worked on live-action films for Walt Disney Productions. American film producer, screenwriter, and comics author

Herbie The Love Bug by Bill Walsh