John Joseph Warner (August 15, 1872 - December 21, 1943), nicknamed "Jack", was a Major League Baseball catcher who caught over 1,000 major league games in 14 seasons with the Boston Beaneaters (1895), Louisville Colonels (1895-96), New York Giants (1896-1901, 1903-04), Boston Americans (1902), St. Louis Cardinals (1905), Detroit Tigers (1905-06), and Washington Senators (1906-08).
In 1906, Warner was part of the first season-long platoon arrangement in baseball, sharing time at catcher with Fred Payne and Boss Schmidt.
In 1,0073 major league games, Warner had a .249 batting average and .303 on-base percentage. He had 870 hits, 348 runs scored, 303 RBIs, 122 extra base hits, and 83 stolen bases. Warner was among the league leaders in being hit by a pitch 3 times and ranks 84 all-time with 91 times hit by a pitch. Warner was born in New York City and died in Far Rockaway, New York.