The ABS challenge system leaderboard ranks batters, pitchers, catchers, teams and umpires throughout the MLB season.

The high-speed-camera technology that lets players challenge pitch calls makes its full-time major-league debut this season.

Over time, some fans likely will call for “full ABS,” in which the robots make every ball-strike call and the plate umpire is rendered obsolete. Bad idea. The human element is part of what makes the ...

In the first ABS challenge, the robot ump actually proved the human had it right. The Netflix broadcast appeared unprepared ...