John Melville Kerr (May 22, 1903 – August 9, 1980) was a Canadian-born major league baseball player.
During his minor league career, Kerr was an outfielder. On September 16, 1925, he became only the second Manitoban to make the majors. In that game, which was his only major league appearance, he came on as a pinch runner for the Chicago Cubs. Kerr scored a run for the only run of his career.