John Joseph Keane (November 3, 1911 – January 6, 1967) was an American professional baseball manager and coach. He managed in Major League Baseball (MLB) for four complete seasons and parts of two others. Keane is perhaps best remembered for his change of teams following the 1964 MLB season—after the St. Louis Cardinals defeated the New York Yankees in the World Series, he unexpectedly resigned as manager of the Cardinals and was subsequently hired to manage the Yankees.