William John Bonness (December 15, 1923 – December 3, 1977), nicknamed "Lefty", was a Major League Baseball pitcher who played for one season. He played for the Cleveland Indians from September 26, 1944, to September 29, 1944.

This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (April 2021)

• Career statistics and player information from Baseball Reference

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