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

The Pittsburgh Pirates haven't had much success with the new challenge system.

One week into the MLB season, the ABS challenge system is proving effective, adding drama while quietly fixing missed calls.

The ABS system reshapes the art behind the plate and opens a new tactical gap. Exaggerated framing can now trigger pointless ...

It has been only three weeks, but Major League Baseball’s ABS challenge system has ushered in a whole new genre of statistics ...

While things will certainly change, and something resembling normalization will occur over the rest of the season, there are ...

Similar to regular instant replay, the goal of the ABS challenge system is to correct the most egregious missed calls, though we will inevitably see some ticky-tack replays as well. More than a few ...

MLB implemented its first-ever ball-strike challenge system this season, and the early reviews are positive — if not, in some cases, comical.

However, while the ABS system was initially designed (and thought of by the public) as strictly a way to give players in the ...

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

Arizona Diamondbacks closer Paul Sewald knows that — in theory — Major League Baseball's new Automated Ball-Strike system shouldn't favor batters or pitchers.