It seemed like the umpire ignored the rules.

That's because "robot umpires," in a sense, have officially arrived to MLB. The human element remains, but players will now ...

On any given pitch, both teams are eligible to initiate an ABS challenge. But not every player on the field has the right.

With a new Major League Baseball season here, a major change will play a unique role in how the year progresses. Coming to the majors this season is the Automated Ball-Strike Challenge System, or ABS ...