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Trends, patterns & fun facts

The shadow zone — every overturned pitch, on the plate

Catcher's view. Each dot is a pitch the umpire called that ABS later ruled on. Red dots were overturned (umpire missed it); gray dots were confirmed (umpire got it right). The rectangle is the ABS strike zone (17″ wide, normalized to batter height).

Reading the plate. Red dots inside the dashed zone = umpire called a ball on a strike — pitcher won that challenge. Red dots outside the dashed zone = umpire called a strike on a ball — batter won. Notice the cluster of red just outside the right edge: those are the famous "off-the-plate" called strikes that catchers know to challenge. Heart-of-plate is mostly gray because heart-of-plate calls are rarely close enough to challenge.

League distribution

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Why two percentages? Raw % treats a 1-of-1 the same as a 25-of-50 — both show 100% / 50%. The Reliable % column applies the Wilson 95% confidence lower bound, which shrinks small-sample numbers toward the league mean. Sort by Reliable % to see which umpires the ABS system is correcting consistently, not just occasionally with luck.

The fair view — accuracy on every called pitch

Challenge data only covers ~5% of pitches and is biased toward calls players think are wrong. The view below is built from every called pitch in 2026 (104,000+), classified against the ABS strike zone independently. This is the unbiased accuracy metric.

What "stolen strikes" means. A called strike on a pitch that the ABS zone says was a ball — the umpire gave the pitcher a strike that wasn't there. Lost strikes = the inverse (ball called on a pitch in the zone). The Net bias column is positive when the umpire systematically favors pitchers (stolen − lost). Across MLB, stolen strikes outnumber lost strikes ~20-to-1 — umpires are pitcher-friendly, and ABS now measures by how much.

Biggest moments of the season

#1

BOS @ NYM

+0.978

Run-value swing

Durbin, Caleb at the plate, Brazoban, Huascar pitching · inning 5 · 2-2 count
Original call: ball → ABS: strike · challenged by catcher

⚡ STRIKEOUT ADDED

HP: Brock Ballou · Jul 11

#2

PHI @ CIN

+0.931

Run-value swing

Suarez, Eugenio at the plate, Bowlan, Jonathan pitching · inning 8 · 2-2 count
Original call: strike → ABS: ball · challenged by batter

⚡ STRIKEOUT REMOVED

HP: Malachi Moore · Jul 7

#3

CLE @ MIN

+0.931

Run-value swing

Schneemann, Daniel at the plate, Rogers, Taylor pitching · inning 7 · 2-2 count
Original call: ball → ABS: strike · challenged by catcher

⚡ STRIKEOUT ADDED

HP: Ryan Additon · Jul 8

#4

BOS @ NYM

+0.781

Run-value swing

Duran, Jarren at the plate, Perez, Cionel pitching · inning 9 · 3-2 count
Original call: strike → ABS: ball · challenged by batter

⚡ STRIKEOUT REMOVED

HP: Alan Porter · Jul 10

#5

CLE @ MIA

+0.713

Run-value swing

Lopez, Otto at the plate, Bibee, Tanner pitching · inning 5 · 3-2 count
Original call: ball → ABS: strike · challenged by catcher

⚡ STRIKEOUT ADDED

HP: Chad Whitson · Jul 11

#6

CHC @ BAL

+0.703

Run-value swing

O'Neill, Tyler at the plate, Rolison, Ryan pitching · inning 7 · 2-2 count
Original call: ball → ABS: strike · challenged by catcher

⚡ STRIKEOUT ADDED

HP: Ramon De Jesus · Jul 7

#7

HOU @ TEX

+0.517

Run-value swing

Paredes, Isaac at the plate, Gray, Peyton pitching · inning 7 · 2-1 count
Original call: ball → ABS: strike · challenged by catcher

HP: Adrian Johnson · Jul 12

#8

ATH @ CWS

+0.513

Run-value swing

Murakami, Munetaka at the plate, Alvarado, Elvis pitching · inning 5 · 1-2 count
Original call: ball → ABS: strike · challenged by catcher

⚡ STRIKEOUT ADDED

HP: Emil Jimenez · Jul 10

#9

TOR @ SD

+0.462

Run-value swing

Cronenworth, Jake at the plate, Gausman, Kevin pitching · inning 4 · 2-2 count
Original call: ball → ABS: strike · challenged by catcher

⚡ STRIKEOUT ADDED

HP: Jen Pawol · Jul 12

#10

MIL @ PIT

+0.452

Run-value swing

Yelich, Christian at the plate, Skenes, Paul pitching · inning 5 · 3-2 count
Original call: ball → ABS: strike · challenged by catcher

⚡ STRIKEOUT ADDED

HP: Alfonso Márquez · Jul 12

#11

LAA @ TEX

+0.452

Run-value swing

Osuna, Alejandro at the plate, Urena, Walbert pitching · inning 4 · 3-2 count
Original call: strike → ABS: ball · challenged by batter

⚡ STRIKEOUT REMOVED

HP: Chad Fairchild · Jul 8

#12

CLE @ MIA

+0.452

Run-value swing

Stowers, Kyle at the plate, Bibee, Tanner pitching · inning 3 · 3-2 count
Original call: strike → ABS: ball · challenged by batter

⚡ STRIKEOUT REMOVED

HP: Chad Whitson · Jul 11

Latest overturned calls

Every challenge