Major League Baseball is introducing its Automatic Balls and Strikes (ABS) system in the 2026 season, aiming to make calling pitches more accurate and reduce human error. This change follows recent adjustments like the runner on second in extra innings and the universal designated hitter, showing MLB’s commitment to improving the fan experience and the pace of play.
The ABS technology, already tested in the minor leagues, grants each team two challenges per game to contest ball and strike calls. Human umpires remain behind the plate, but any call can be reviewed with ABS, leading to overturned decisions when necessary. This blend of tradition and technology has created intense moments on the field, especially during spring training.
Early Game Struggles for an Umpire Under ABS Scrutiny
The system’s impact was vividly illustrated on February 24, 2026, when umpire Mitch Trzeciak officiated a game between the Pittsburgh Pirates and Boston Red Sox. Trzeciak faced five consecutive challenges that resulted in overturned calls, an unusually high number that highlighted the difficulties human umpires face with borderline pitches. Despite a rough start, Trzeciak finally got a challenge call correct in the fourth inning, earning applause from the crowd.
Each team begins with two challenges, which they can use at any moment. In this matchup, Pittsburgh initiated the first challenge after Trzeciak called a ball that ABS determined was a clear strike. Subsequent calls were similarly corrected, revealing significant inaccuracies in judgment early in the game.
You think YOU’VE had a bad day??Here’s 5 Consecutive Calls overturned by ABS challenges.The cheer at the end. 🤣 pic.twitter.com/5EG0WLgm21— Rob Friedman (@PitchingNinja) February 24, 2026
The Narrowest Margin: When a Ball Misses by Almost Nothing
The introduction of ABS has also brought attention to how incredibly difficult an umpire’s job can be, especially when a pitch barely misses the strike zone. In one case from spring training, a pitch was called a strike by the umpire, but ABS showed that it missed the zone by less than a tenth of an inch. The camera angle made it look like the ball was touching the edge of the zone, exemplifying how human perspective can be deceived even with the naked eye.
ABS determined this ball missed the strike zone by the width of one atom pic.twitter.com/YnxPQTpdsN— Talkin’ Baseball (@TalkinBaseball_) February 24, 2026
ABS Demonstrates Its Importance Through Hard-to-Believe Mistakes
Mitch Trzeciak was again involved in a notable ABS moment when his first incorrect call of a game went viral. A pitch that appeared perfectly centered was actually ruled a ball by Trzeciak but overwhelmingly shown to be a strike by ABS, with the review zooming in to reveal the pitch was an entire baseball’s width above the bottom of the zone. This clip gained traction online as a stark example of why MLB adopted the ABS system.
This is why ABS was invented. 🤣 pic.twitter.com/RyHmz7BFOM— Rob Friedman (@PitchingNinja) February 24, 2026
Pitcher’s Frustration Surfaces After Prospect’s Challenge
ABS has also affected player dynamics on the field, provoking heated reactions during games. During a Philadelphia Phillies versus Detroit Tigers spring training matchup, prospect Dylan Campbell challenged a called strikeout on a pitch down the middle despite two strikes against him. The ABS system upheld Campbell’s challenge, confirming the pitch was indeed a strike. Tigers pitcher Jack Flaherty responded angrily, shouting at Campbell as he left the field, illustrating how ABS can influence the mental interplay between players.
Yankees Catcher Attempts to Discourage a Futile Challenge
Trust between pitchers and catchers is crucial when deciding whether to challenge a call. In a spring training game, New York Yankees pitcher Fernando Cruz chose to challenge a strike call despite his catcher Austin Wells signaling against it. The challenge was unsuccessful, as the pitch clearly landed within the strike zone, highlighting the occasional misjudgments even players make during ABS use.
Fernando Cruz loses a challenge on a pitch that wasn’t closeYou can see Austin Wells tell him not to challenge, but Cruz shrugs like eh why not pic.twitter.com/X7aakT0wyt— Talkin’ Yanks (@TalkinYanks) February 28, 2026
Baseball Tradition Reimagined: Batter Walks After Overturned Strikeout
Drawing comparisons to David Ortiz’s well-known intentional walks, Wilyer Abreu displayed a new twist in the ABS era. Facing a 3-2 count, Abreu was initially called out on strikes. Without hesitation, he challenged the call, confident in the system’s judgment. He removed his ankle guard, placed it on home plate, and began jogging towards first base even before the umpire finished announcing the review. The ABS confirmed the pitch missed the strike zone by 0.6 inches, overturning the strikeout and awarding Abreu a walk.
Wilyer Abreu tapped his head then started walking to first before the ump was even done announcing the challenge pic.twitter.com/Pr6tsENm8c— Talkin’ Baseball (@TalkinBaseball_) March 1, 2026
These moments from the 2026 spring training exemplify the turbulent launch of the ABS system in Major League Baseball. While it offers unprecedented accuracy and fairness in calling balls and strikes, it also exposes the challenges umpires face and the new strategic layers added for players and coaches. The ABS system’s implementation is a transformative step, likely to modify how emotions run on the field and how games are managed as the season progresses.
Going forward, it will be critical to observe how acceptance of ABS grows among umpires and players alike and how the system may evolve. These “MLB robo-ump moments 2026” reflect not only technological advancement but a test of resilience for those who have long been the arbiters of the strike zone.
You think YOU'VE had a bad day??
Here's 5 Consecutive Calls overturned by ABS challenges.
The cheer at the end. 🤣 pic.twitter.com/5EG0WLgm21
— Rob Friedman (@PitchingNinja) February 24, 2026
ABS determined this ball missed the strike zone by the width of one atom pic.twitter.com/YnxPQTpdsN
— Talkin' Baseball (@TalkinBaseball_) February 24, 2026
This is why ABS was invented. 🤣 pic.twitter.com/RyHmz7BFOM
— Rob Friedman (@PitchingNinja) February 24, 2026
Jack Flaherty pitching to Phillies prospect Dylan Campbell, and when a two-strike pitch was taken for Strike 3, Campbell asked for a challenge. The replay showed the ball was just about down the middle, and Flaherty appeared to yell in the direction of the hitter as he walked off…
— Buster Olney (@Buster_ESPN) February 27, 2026
Fernando Cruz loses a challenge on a pitch that wasn't close
You can see Austin Wells tell him not to challenge, but Cruz shrugs like eh why not pic.twitter.com/X7aakT0wyt
— Talkin' Yanks (@TalkinYanks) February 28, 2026
Wilyer Abreu tapped his head then started walking to first before the ump was even done announcing the challenge pic.twitter.com/Pr6tsENm8c
— Talkin' Baseball (@TalkinBaseball_) March 1, 2026
