Warren A. McLaughlin (January 22, 1876 – October 22, 1923) was an American Major League Baseball pitcher with the Philadelphia Phillies and Pittsburgh Pirates from 1900–1903. He began pitching for the Phillies in July 1900, after playing for semi-pro teams in New Jersey. He spent some time with New London in the Connecticut League, before signing with Pittsburgh in September 1902. He was released in March 1903.