The new computerized system is being tested during spring training, leading to a series of challenges from players who don’t know the strike zone quite as well as they think.

Here is what every big leaguer needs to know about ABS, according to players and managers who have experience with it in the minor leagues.

The Automated Ball-Strike system, or ABS system, which was tested at the Triple-A level during the 2023 and '24 seasons, is slated to be featured in roughly 60% of games this spring. As clubs begin training for game action with live batting practice sessions, the ABS system is being previewed for hitters and pitchers.