During spring training this year, Major League Baseball used a challenge system for balls and strikes based on ABS (automated ball-strike system). For those unaware, ABS uses a Hawk-Eye camera ...

MLB's automated ball-strike system explained as spring training games kick off with robo-ump challenges ABS is getting a major-league test this spring ...

Using the automated ball-strike system (ABS), teams will have the option to challenge ball-strike calls in the majority of spring training games.