William M. "Ad" Yale (April 17, 1870April 27, 1948) was an American professional baseball player. He appeared in four games in Major League Baseball for the 1905 Brooklyn Superbas as a first baseman. He also had an extensive minor league baseball career, playing from 1897 until 1914 for a number of teams, primarily the Bridgeport Orators, for whom he played from 1898 to 1905.