Just over half the ball/strike challenges were successful on the first day of spring training games as Major League Baseball prepared for the first regular-season use of the automated ball-strike ...

Umpires first began calling both balls and strikes way back in 1864, and baseballers have been arguing about those calls ever since. Strike-zone judgment has been the subject of some untold number of ...

It isn't clear exactly who will benefit the most from ABS challenges, but pitchers who can paint at the top of the zone might ...

MLB's Automated Ball-Strike challenge system is again part of spring training, but unlike last year, it will remain once the regular season starts. It's about to profoundly change baseball. K.C.

A view of the Automated Ball-Strike Challenge System’s call of a ball as it appeared during the Seattle Mariners game on Friday. (Screen grab via Mariners.TV) The Seattle Mariners opened their Spring ...