What Abstap is
ABS — the Automated Ball-Strike challenge system — is live across the 2026 MLB regular season. Abstap logs every challenge with its full game context: inning, count, score, baserunners, pitch location, and the umpire behind the plate. All of it comes from the public MLB Stats API, the same feed that powers official box scores, synced every morning at roughly 6 AM ET. Nothing is hand-entered or estimated.
Citing Abstap
Journalists, broadcasters, and researchers are welcome to cite Abstap. Two requests:
- Attribute figures to Abstap (abstap.com) and link to the specific page you pulled them from.
- When you reference a ranking, name the metric: the Robbery Score is leverage index × call magnitude. The methodology page spells out exactly how every number is computed, and where the method has limits.
Where the stories are
Every page below updates daily. Each is a stable, linkable source for a different angle.
- Daily Robberies. Every overturned call, ranked by Robbery Score.
- Umpires by overturn rate. Whose called zone diverges most from the rulebook.
- Team challenge stats and player challenge leaders. Who challenges most, and who wins.
- Most overturned games and today's home-plate assignments. The day's context, before and after.
- RSS feed. Subscribe to every overturned call as it lands — same data as the leaderboard, in your reader.
Need a specific cut?
Working on a story about one team, one umpire, or a particular date range? Email us and we'll pull the exact slice you need — the data behind any leaderboard, on request.
Brand assets & boilerplate
Download the Abstap logo (PNG). Please don't alter or recolor the mark. The MLB team logos shown across the site are property of their respective clubs and are not part of this kit.
About Abstap (copy-paste):
Abstap tracks every Automated Ball-Strike (ABS) challenge in Major League Baseball — every overturned call and every umpire’s worst zone — sourced daily from the public MLB Stats API. It ranks the most consequential missed calls by Robbery Score: leverage index × the inches a pitch missed the rulebook strike zone. Abstap is an independent project and is not affiliated with Major League Baseball.