infielder (baseball) a person who plays a position in the infield
baseball game,
baseball a ball game played with a bat and ball between two teams of nine players; teams take turns at bat trying to score runs; "he played baseball in high school"; "there was a baseball game on every empty lot"; "there was a desire for National League ball in the area"; "play ball!"
softball game,
softball a game closely resembling baseball that is played on a smaller diamond and with a ball that is larger and softer
catcher -
the position on a baseball team of the player who is stationed behind home plate and who catches the balls that the pitcher throws; "a catcher needs a lot of protective equipment"; "a catcher plays behind the plate"
position the act of positing; an assumption taken as a postulate or axiom
catcher -
The player that squats behind home plate and receives the pitches from the pitcher.
Wikipedia
Catcher is a position for a baseball or softball player. When a batter takes his turn to hit, the catcher crouches behind home plate, in front of the umpire, and receives the ball from the pitcher. This is a catcher's primary duty, but he is also called upon to master many other skills in order to field his position well.