Automated Ball-Strike System

The Automated Ball-Strike System (ABS) is a system that automates the interpretation of whether pitches are in the strike zone in baseball games. It is currently used by the KBO League in South Korea, by the Mexican Baseball League, and by Minor League Baseball (MiLB) and Major League Baseball (MLB) in the United States and Canada. In MLB and MiLB, it is used to enable player challenges of umpire calls of balls and strikes, while in the KBO League and previously in MiLB, it calls pitches automatically.