Bold claim: The new Automated Ball-Strike (ABS) Challenge System is already reshaping the way games are decided, and its early spring-time test proves it can deliver quicker, more accurate calls without erasing the human element. But here’s where it gets controversial: does this shift empower players too much, or does it preserve integrity while speeding up the action?
In a spring training game at Roger Dean Chevrolet Stadium, Miami Marlins pitcher Josh White briefly appeared to have struck out Joshua Baez on an 86.1 mph slider. The umpire’s call stood until Baez tapped his helmet and a video board review showed the pitch was outside the strike zone by a razor-thin margin of one-tenth of an inch. The call was overturned to Ball 2, then White threw another slider that should have been a strike, but Baez again tapped his helmet. A second review showed the pitch was outside by three-tenths of an inch, and this time the call was Ball 3. Moments later Baez walked, and St. Louis Cardinals tied the game with a sac fly. The Cardinals won 3-2 on a walk-off.
Two helmet taps changed the course of the game and highlighted a key advantage of ABS: real-time, precise decisions that can alter outcomes in the moment. As Marlins manager Clayton McCullough noted, that sequence aligns with MLB’s dream scenario for the system when used well.
What is ABS? It’s MLB’s challenge framework that debuted after years of minor-league testing and a spring-training trial run with major-league teams. Each side starts with two challenges (plus one per inning in extra frames). Challenges can be initiated by pitchers, catchers, or batters, and a successful overturn preserves the challenge. The process is rapid—about 15 seconds from challenge to result—and the results are shown on the stadium video board and TV broadcasts, ensuring transparency.
So far in spring, Marlins catchers have been the primary users of challenges and have seen solid success. Agustin Ramirez is 4 for 5 in challenges, Liam Hicks 4 for 6, and Joe Mack 1 for 2. McCullough credits Marlins catching director Maxx Garrett and first-base coach Craig Driver for embedding the practice into game-ready rhythm, using in-stadium tech to gamify training and build trust in the system.
Mack, who has prior ABS experience from the minors, says the team has strategies for when to use challenges, but catchers typically “rip them” when they believe a ball is a strike or a strike is a ball—emphasizing instinct married to data.
Another notable shift: the strike zone is no longer a one-size-fits-all target. While the width stays 17 inches across, the height flexes by batter. The top edge sits at 53.5% of a hitter’s height, the bottom at 27%. In practice, this means pitchers and catchers must tailor their approach to each batter’s dimensions, adding a new layer of strategic nuance to the plate.
Injury and roster notes from the Marlins camp:
- Outfielder Kyle Stowers (right hamstring strain) has been taking live batting practice and is progressing toward live at-bats on the back fields.
- RHP Janson Junk (right ankle sprain) is slated for a Grapefruit League debut on Saturday, one inning.
- RHP Anthony Bender (shin) will undergo a few more live batting practice sessions before full Spring games.
- LHP Thomas White (right oblique strain), MLB’s No. 17 overall prospect, is out for the remainder of spring.
- White and six others—Patrick Monteverde, Dale Stanavich, Stephen Jones, Evan McKendry, Samy Vasquez, and catcher Sam Praytor—were reassigned to minor-league camp.
The ABS system aims to balance precision with the human element, allowing officials to maintain authority while reducing obvious misses. It’s still early, but the trend is clear: ABS can streamline calls, enhance fairness, and introduce a new strategic dimension to the game.
What do you think? Should ABS be embraced as the future of officiating in baseball, or does it risk over-policing the strike zone and diminishing umpire judgment? Is there a downside teams might leverage as a new kind of competitive edge? Share your views in the comments.
