John James McCloskey (April 4, 1862 – November 17, 1940) was a professional baseball player and manager.

As a player, McCloskey was primarily an outfielder and first baseman; it is unknown if he batted and threw right-handed or left-handed.

Within available records, his best offensive performance was in 1890 with the Houston Mudcats of the Texas League, when he batted .340 and had 18 stolen bases in 38 games.

[4] McCloskey managed the Colonels for their first 19 games of the 1896 season, winning only twice;[2] he was succeeded by Bill McGunnigle.

[2] McCloskey's managerial winning percentage is the second-worst in major league history, with only Doc Prothro lower (138–320, .301).