Unlike with human umpires, who studies have shown adjust the strike-zone parameters based on the count, ABS maintains a rigid definition of the strike zone based on each batter's height.

One of the biggest adjustments is that the zone called by umpires isn't a rectangle and tends to bulge in the middle. MLB research also found that the human strike zone tightens from 550 square ...

The system is capable of pinpointing where the ball was in relation to the strike zone as it crosses the plate. It is similar to the line-calling system used in tennis. The minor leagues have been ...

Veteran MLB umpire Mike Muchlinski went viral on social media for his sense of humor after he got one of his strike zone calls challenged. Muchlinski was the home plate umpire for Tuesday’s ...

PHOENIX — The robo ump could kill K-Zone. On Thursday, Major League Baseball will employ what it calls the automated ball-strike system, or ABS, in a big-league spring training game for the ...

He threw a 95-mph fastball that clipped the bottom of the zone on an 0-1 pitch, but it was called a ball. Poteet was convinced it was a strike and immediately challenged. The pitch was shown on ...

The Automated Ball-Strike System allows the players closest to the strike zone — the pitcher, catcher and batter — to dispute a call by the home plate umpire. A simple tap of their helmet or ...

In the bottom of the third inning of a matchup against the New York Yankees, Rays right-handed pitcher Eric Orze fired a 3-2 changeup high above the strike zone. When the home plate umpire called ...