 Mathewson and McGraw are honored by the Giants, but played in an era before uniform numbers became standard in baseball.It was announced that the Giants will retire Will Clark's #22 on July 11, 2020.John McGraw (3B, 1902–06; manager, 1902–32) and Christy Mathewson (P, 1900–16), who were members of the New York Giants before the introduction of uniform numbers, have the letters "NY" displayed in place of a number.