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

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 ...

Saw a hitter, catcher, or pitcher tap their helmet after a pitch and wondered what just happened. Here’s a clear guide to MLB’s ABS challenge system, including who can challenge, how many challenges ...

The introduction of the Automated Ball-Strike (ABS) system is already changing the landscape of Major League Baseball in 2026 ...

MESA, Ariz. — For the first five months of Triple-A Iowa’s 2025 season, right-hander Gavin Hollowell let his catchers decide whether to signal for the Automated Ball-Strike challenge system on any ...

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

A scoreboard shows an ABS challenge in spring training. MLB is comfortable with the system's margin of error. But not all players or umpires are quite as comfortable ...

The 2026 MLB season is officially here, but not without one of the most major changes in the history of the sport. After a century-and-a-half of complete human element behind home plate, batters, ...

Major League Baseball has transformed with rule changes like the pitch clock, extra-inning ghost runner, and automated ball-strike system. One proposed change suggests letting the ABS system handle ...

If any umpires complain about the automated ball-strike challenge system, the best thing that baseball fans can do is roll ...

Some MLB umpires are “stewing” about the new Automated Ball-Strike Challenge (ABS) system and believe it’s creating a ...