Backstop

Webster's Dictionary of the English Language

·add. ·noun In cricket, the longstop; also, the wicket keeper.

II. Backstop ·add. ·noun In rounders, the player who stands immediately behind the striking base.

III. Backstop ·add. ·noun In baseball, a fence, prop. at least 90 feet behind the home base, to stop the balls that pass the catcher; also, the catcher himself.