Backstop
Encyclopedia
Backstop is the term used for the screen behind home plate in baseball
Baseball
Baseball is a bat-and-ball sport played between two teams of nine players each. The aim is to score runs by hitting a thrown ball with a bat and touching a series of four bases arranged at the corners of a ninety-foot diamond...

 or softball
Softball
Softball is a bat-and-ball sport played between two teams of 10 to 14 players. It is a direct descendant of baseball although there are some key differences: softballs are larger than baseballs, and the pitches are thrown underhand rather than overhand...

. The screen prevents foul ball
Foul ball
In baseball, a foul ball is a batted ball that:* Settles on foul territory between home and first base or between home and third base, or* Bounds past first or third base on or over foul territory, or...

s and errant pitches
Wild pitch
In baseball, a wild pitch is charged against a pitcher when his pitch is too high, too short, or too wide of home plate for the catcher to control with ordinary effort, thereby allowing a baserunner, perhaps even the batter-runner on strike three or ball four, to advance.A wild pitch usually...

 from straying too far from home plate
Home Plate
Home Plate is the fifth album by Bonnie Raitt, released in 1975 .-Track listing:#"What Do You Want the Boy to Do?" – 3:19#"Good Enough" – 2:56#"Run Like a Thief" – 3:02...

or hitting spectators.
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