MLB · 1 hour ago

MLB ABS Challenge System Tracker: 2026 Success Rates for Every Team

Joe Cervenka

Host · Writer

The Future of the Human Element - Have Your Say
Is the ABS Challenge a Success or Needs Work?

We’ve seen the data: some teams are sharp operators in the challenge booth, while others are bleeding value on failed attempts. But the real debate isn't just about the numbers, it's about the soul of the game.

We want to hear from you: Does the ABS system provide the structural integrity baseball has been missing, or does it strip away the legendary art of pitch framing and the human profile of the umpire?
The Science of the Strike Zone: Understanding MLB’s ABS System
How the Automated Ball-Strike Challenge Works

The ABS (Automated Ball-Strike) system, powered by Hawk-Eye technology, is officially transforming the big league landscape. Unlike a fully automated robo-ump where every pitch is called by a computer, the ABS Challenge System keeps the human element behind the plate while giving teams a tool for recourse.

Each team enters the game with a set number of challenges. When a pitcher, catcher, or batter believes a call was missed, they signal for a challenge, triggering a near-instantaneous flight-track verification. If the challenge is successful (the call is overturned), the team retains it. If it fails, it’s gone. This competitive laboratory ensures that the most critical counts are decided by a precise, rulebook-defined zone—not human error.

Data is up to games on Thursday, April 2nd
30. Miami Marlins
Challenges: 2

Challenges Won: 0

Challenges Lost: 2

Won/Overturn Rate: 0%

The Miami Marlins are searching for their first win in the challenge booth. An 0-for-2 start is a small detail that Clayton McCullough's squad will look to fix in the coming week.
29. New York Mets
Challenges: 2

Challenges Won: 0

Challenges Lost: 2

Won/Overturn Rate: 0%

The New York Mets have yet to win a challenge in 2026. While the volume is low (2), the 0% success rate is a blemish on an otherwise analytical organization.
28. Cleveland Guardians
Challenges: 7

Challenges Won: 1

Challenges Lost: 6

Won/Overturn Rate: 14%

The Cleveland Guardians sit at the bottom of the efficiency table. Losing 6 of 7 challenges is a pattern of poor evidence collection that is actively hurting their momentum in close games.
27. Atlanta Braves
Challenges: 5

Challenges Won: 1

Challenges Lost: 4

Won/Overturn Rate: 20%

The Atlanta Braves are a statistical outlier. Despite having a blue-chip roster, their 20% challenge success rate is among the worst in MLB.
26. Washington Nationals
Challenges: 4

Challenges Won: 1

Challenges Lost: 3

Won/Overturn Rate: 25%

The Washington Nationals are mirroring the struggles of a few MLB teams. A 25% overturn rate suggests they are over-challenging pitches that are clearly within the automated zone's boundaries.
25. Milwaukee Brewers
Challenges: 4

Challenges Won: 1

Challenges Lost: 3

Won/Overturn Rate: 25%

The Milwaukee Brewers are currently bottom-tier in challenge efficiency. Losing 3 of 4 attempts indicates a leaky faucet in their decision-making process that needs immediate correction.
24. Colorado Rockies
Challenges: 2

Challenges Won: 1

Challenges Lost: 1

Won/Overturn Rate: 50%

The Colorado Rockies have only engaged the system twice, splitting the results. Their early metrics suggest they are struggling to find value in the thin air of the challenge booth.
23. Kansas City Royals
Challenges: 1

Challenges Won: 1

Challenges Lost: 0

Won/Overturn Rate: 100%

The Kansas City Royals are perfect—albeit on the lowest volume possible. By winning their lone challenge, they’ve maintained a 100% success rate, though more data is needed to assess their process.
22. Houston Astros
Challenges: 5

Challenges Won: 2

Challenges Lost: 3

Won/Overturn Rate: 40%

The Houston Astros are off to a slow start with ABS challenges. A 40% win rate is below the sharp threshold.
21. Pittsburgh Pirates
Challenges: 4

Challenges Won: 2

Challenges Lost: 2

Won/Overturn Rate: 50%

The Pittsburgh Pirates have a 50% success rate, but their wins on challenges have not come in ultra-important scenarios. This suggests they are losing challenges on pitches that were statistically more likely to be strikes.
20. San Diego Padres
Challenges: 4

Challenges Won: 2

Challenges Lost: 2

Won/Overturn Rate: 50%

The San Diego Padres are maintaining an even keel. With 2 wins and 2 losses, the Padres are neither significantly helping nor hurting their win probability through the challenge system.
19. St. Louis Cardinals
Challenges: 4

Challenges Won: 2

Challenges Lost: 2

Won/Overturn Rate: 50%

The St. Louis Cardinals have seen average results in the challenge booth. Split 2-2, the Cardinals need to refine their evidence collection to climb into the elite success brackets.
18. Chicago White Sox
Challenges: 4

Challenges Won: 2

Challenges Lost: 2

Won/Overturn Rate: 50%

The Chicago White Sox are sitting at the break-even mark. While their 2-2 record is average, the challenges they did win were in high-impact situations.
17. San Francisco Giants
Challenges: 3

Challenges Won: 2

Challenges Lost: 1

Won/Overturn Rate: 67%

The San Francisco Giants are maximizing their low-volume opportunities. Winning 2 of 3 challenges helps maintain a positive metric and shows tactical poise.
16. Arizona Diamondbacks
Challenges: 3

Challenges Won: 2

Challenges Lost: 1

Won/Overturn Rate: 67%

The Arizona Diamondbacks are middling in early-season efficiency. Their 67% overturn rate on low volume suggests a sharp approach that avoids frivolous challenges.
15. Chicago Cubs
Challenges: 3

Challenges Won: 2

Challenges Lost: 1

Won/Overturn Rate: 67%

The Chicago Cubs are showing high-level discipline. By only challenging 3 times and winning twice, they are maximizing their efficiency and keeping their challenge in their pocket for when it truly matters.
14. Los Angeles Dodgers
Challenges: 3

Challenges Won: 2

Challenges Lost: 1

Won/Overturn Rate: 67%

The Los Angeles Dodgers are playing the long game. They have the lowest volume of challenges among top teams, but a 67% success rate shows that when they do speak up, they are usually right.
13. Los Angeles Angels
Challenges: 9

Challenges Won: 3

Challenges Lost: 6

Won/Overturn Rate: 33%

The Los Angeles Angels have the lowest success rate among teams with high volume. Losing 6 of 9 challenges indicates a disconnect in the dugout, often wasting their challenge on clear strikes.
12. Toronto Blue Jays
Challenges: 8

Challenges Won: 3

Challenges Lost: 5

Won/Overturn Rate: 38%

The Toronto Blue Jays are currently in the red. A 38% win rate suggests that the Jays are challenging marginal calls that aren't being overturned, a fountain of lost opportunities in the early season.
11. Texas Rangers
Challenges: 7

Challenges Won: 3

Challenges Lost: 4

Won/Overturn Rate: 43%

The Texas Rangers are struggling with the timing of their challenges. With 4 losses on 7 attempts, the Rangers are losing the probability battle more often than not.
10. Boston Red Sox
Challenges: 6

Challenges Won: 3

Challenges Lost: 3

Won/Overturn Rate: 50%

The Boston Red Sox round out the middle of the pack with a 50% success rate. Their ability to identify structural fragility in the umpire's zone has been inconsistent, resulting in 3 lost challenges.
9. Tampa Bay Rays
Challenges: 6

Challenges Won: 3

Challenges Lost: 3

Won/Overturn Rate: 50%

Known for their analytical traits, the Tampa Bay Rays are surprisingly average in the ABS challenge department so far. They’ve split their 6 challenges, neither gaining nor losing significant ground against expectation.
8. Philadelphia Phillies
Challenges: 6

Challenges Won: 3

Challenges Lost: 3

Won/Overturn Rate: 50%

The Philadelphia Phillies are currently split down the middle. A 50% overturn rate is above league average, but for a team with World Series aspirations, improving this small detail will be key to managing high-stakes innings.
7. Seattle Mariners
Challenges: 5

Challenges Won: 3

Challenges Lost: 2

Won/Overturn Rate: 60%

The Seattle Mariners have been selective through the first week of the season. A 60% overturn rate suggests a reliable process, though their overall results show there is still room for optimization.
6. Athletics
Challenges: 6

Challenges Won: 4

Challenges Lost: 2

Won/Overturn Rate: 67%

The Athletics are finding solid value in the challenge system. Converting 4 of 6 attempts into wins shows a sharp understanding of the automated zone, helping a young roster stay competitive in tight counts.
5. Detroit Tigers
Challenges: 9

Challenges Won: 5

Challenges Lost: 4

Won/Overturn Rate: 56%

The Detroit Tigers are hovering just above the break-even point. With a 56% overturn rate, the Tigers are active in the challenge market but lack the elite accuracy seen at the top of the standings.
4. Baltimore Orioles
Challenges: 7

Challenges Won: 6

Challenges Lost: 1

Won/Overturn Rate: 86%

The Baltimore Orioles boast the most clinical challenge record in MLB. While their volume (7) is lower than the leaders', an 86% win rate shows a disciplined approach, pulling the trigger only when the evidence is overwhelming.
3. Cincinnati Reds
Challenges: 11

Challenges Won: 8

Challenges Lost: 3

Won/Overturn Rate: 73%

The Cincinnati Reds have proven to be aggressive and accurate. Their 73% success rate indicates that their catchers, hitters and dugout staff are in sync, minimizing bad calls in the zone.
2. New York Yankees
Challenges: 11

Challenges Won: 8

Challenges Lost: 3

Won/Overturn Rate: 73%

The New York Yankees are operating with high-level precision in the ABS era. By winning 8 of their 11 challenges, the Bronx Bombers are successfully reclaiming strikes and extending at-bats, a critical factor for their veteran-heavy lineup.
1. Minnesota Twins
Challenges: 12

Challenges Won: 9

Challenges Lost: 3

Won/Overturn Rate: 75%

The Minnesota Twins lead the league in challenge volume and efficiency. Their 75% overturn rate on 12 attempts suggests an elite internal process and a sharp eye for strike zone discrepancies, providing a significant edge in high-leverage counts.
The Future of the Human Element - Have Your Say
Is the ABS Challenge a Success or Needs Work?

We’ve seen the data: some teams are sharp operators in the challenge booth, while others are bleeding value on failed attempts. But the real debate isn't just about the numbers, it's about the soul of the game.

We want to hear from you: Does the ABS system provide the structural integrity baseball has been missing, or does it strip away the legendary art of pitch framing and the human profile of the umpire?
The Science of the Strike Zone: Understanding MLB’s ABS System
How the Automated Ball-Strike Challenge Works

The ABS (Automated Ball-Strike) system, powered by Hawk-Eye technology, is officially transforming the big league landscape. Unlike a fully automated robo-ump where every pitch is called by a computer, the ABS Challenge System keeps the human element behind the plate while giving teams a tool for recourse.

Each team enters the game with a set number of challenges. When a pitcher, catcher, or batter believes a call was missed, they signal for a challenge, triggering a near-instantaneous flight-track verification. If the challenge is successful (the call is overturned), the team retains it. If it fails, it’s gone. This competitive laboratory ensures that the most critical counts are decided by a precise, rulebook-defined zone—not human error.

Data is up to games on Thursday, April 2nd

Is the ABS Challenge a Success or Needs Work?

How the Automated Ball-Strike Challenge Works

Challenges: 2

Challenges Won: 0

Challenges Lost: 2

Won/Overturn Rate: 0%

Challenges: 2

Challenges Won: 0

Challenges Lost: 2

Won/Overturn Rate: 0%

Challenges: 7

Challenges Won: 1

Challenges Lost: 6

Won/Overturn Rate: 14%

Challenges: 5

Challenges Won: 1

Challenges Lost: 4

Won/Overturn Rate: 20%

Challenges: 4

Challenges Won: 1

Challenges Lost: 3

Won/Overturn Rate: 25%

Challenges: 4

Challenges Won: 1

Challenges Lost: 3

Won/Overturn Rate: 25%

Challenges: 2

Challenges Won: 1

Challenges Lost: 1

Won/Overturn Rate: 50%

Challenges: 1

Challenges Won: 1

Challenges Lost: 0

Won/Overturn Rate: 100%

Challenges: 5

Challenges Won: 2

Challenges Lost: 3

Won/Overturn Rate: 40%

Challenges: 4

Challenges Won: 2

Challenges Lost: 2

Won/Overturn Rate: 50%

Challenges: 4

Challenges Won: 2

Challenges Lost: 2

Won/Overturn Rate: 50%

Challenges: 4

Challenges Won: 2

Challenges Lost: 2

Won/Overturn Rate: 50%

Challenges: 4

Challenges Won: 2

Challenges Lost: 2

Won/Overturn Rate: 50%

Challenges: 3

Challenges Won: 2

Challenges Lost: 1

Won/Overturn Rate: 67%

Challenges: 3

Challenges Won: 2

Challenges Lost: 1

Won/Overturn Rate: 67%

Challenges: 3

Challenges Won: 2

Challenges Lost: 1

Won/Overturn Rate: 67%

Challenges: 3

Challenges Won: 2

Challenges Lost: 1

Won/Overturn Rate: 67%

Challenges: 9

Challenges Won: 3

Challenges Lost: 6

Won/Overturn Rate: 33%

Challenges: 8

Challenges Won: 3

Challenges Lost: 5

Won/Overturn Rate: 38%

Challenges: 7

Challenges Won: 3