Joseph Jerome McGinnity (March 20, 1871 – November 14, 1929) was an American right-handed pitcher in Major League Baseball (MLB) in the late 19th and early 20th century. McGinnity played in MLB for ten years, pitching for the National League's (NL) Baltimore Orioles (1899) and Brooklyn Superbas (1900), before jumping to the American League (AL) to play for the Baltimore Orioles (AL) (1901–1902). He returned to the NL with the New York Giants (1902–1908). McGinnity continued to pitch in the minor leagues, eventually retiring from baseball for good at the age of 54.