Jack Clements

MLB debut
April 22, 1884, for the Philadelphia Keystones
Last MLB appearance
October 2, 1900, for the Boston Beaneaters
MLB statistics
Batting average .287
Home runs 77
Runs batted in 687
Stats at Baseball Reference 
Teams
As player
Philadelphia Keystones (1884)
Philadelphia Quakers / Phillies (1884–1897)
St. Louis Browns (1898)
Cleveland Spiders (1899)
Boston Beaneaters (1900)

John J. Clements (July 24, 1864 – May 23, 1941) was an American professional baseball player. He played as a catcher in Major League Baseball for 17 seasons. Despite being left-handed, Clements caught 1,076 games, almost four times as many as any other left-handed player in major league history and was the last left-hander to catch on a regular basis. He is credited with being the first catcher to wear a chest protector.

Born in Philadelphia, Clements began his major league career in 1884 in the Union Association. He played as a catcher/outfielder for the Philadelphia Keystones until the team folded in August. Clements then went to the National League, signing with the Philadelphia Quakers to finish the year.

Clements spent the next 13 seasons with the Quakers (who became the Phillies in 1890), and became the team's regular catcher in 1888. He also served as a player-manager during part of the 1890 season when manager Harry Wright suffered temporary blindness. During the 1890s, he established himself as one of the National League's top hitters, finishing among the top 4 in batting average on 3 occasions. Clements also hit for power, finishing second in the NL with 17 home runs in 1893 and finishing third in the NL with 13 in 1895. Also in 1895, he finished with a .394 batting average, the highest single-season average by a catcher in major league history.