Noun
strike zone (plural strike zones)
(baseball) The area through which if a pitched ball passes, it will be called a strike, typically from the batter's knees to the belt and the width of home plate.
That umpire often compresses the strike zone late in the game.
At a minimum, one umpire will stand behind the catcher, to have a good view of the strike zone, and call balls and strikes. Source: Internet
Again, make hitters swing the bat and get quick outs by pounding the strike zone early with quality pitches. Source: Internet
Against LHPs again there are fewer pitches in the strike zone. Source: Internet
Although diluted pitching is mentioned on occasion, or smaller ballparks, or a smaller strike zone, this period is likely destined to be known as the “steroid era,” reflecting the popular consensus of the causes of the higher offensive levels. Source: Internet
A pitch at which the batter does not swing and which does not pass through the strike zone is called a ball (short for "no ball"). Source: Internet
In a graphic from 1968 that accompanied an article in Sports Illustrated magazine, Williams divided the strike zone into 77 baseballs, with each baseball containing his projected batting average for pitches thrown in that location. Source: Internet