#82 - The Strike Zone Is Exposing Baseball's Vision Problem
MLB's challenge system isn't just correcting calls — it's measuring human visual performance for the first time.
55%.
That's the overturn rate on challenged ball-strike calls under MLB's new Automated Ball-Strike system. More than half the time a player or catcher challenges a call, the umpire got it wrong.
Before piling on the umpires, consider what that number actually means. Every challenged pitch is, by definition, a borderline pitch — nobody wastes a challenge on a fastball down the middle. These are late-breaking sweepers, disappearing changeups, pitches clipping the lower edge of the zone. The hardest perceptual tasks in the game.
And the overturn rate tells us exactly what vision science has always predicted: even experienced professionals fail on the pitches that most stress the visual system.
This episode walks through why those specific pitches break human visual processing, why ABS just turned the strike zone into a vision lab, and the awkward contradiction at the heart of how baseball currently evaluates its officials. Plus the four-step framework I'd apply to umpire vision evaluation tomorrow if a club asked.
IN THIS EPISODE, YOU'LL LEARN:
- What the 55% overturn rate actually measures — and why it's not an indictment of umpires
- Why late-breaking sweepers and low-zone pitches predictably break trajectory prediction and depth perception
- The contradiction between how MLB evaluates player vision versus umpire vision
- A four-step framework for sport-specific visual performance evaluation of officials
EPISODE TIMESTAMPS:
- 00:00 - The 55% Overturn Rate
- 00:40 - Why Borderline Pitches Break Vision
- 01:20 - Trajectory Prediction Failure
- 02:00 - The Low-Zone Depth Problem
- 02:40 - From Argument To Data Point
- 03:25 - The Player–Umpire Contradiction
- 04:05 - The Four-Step Framework
- 05:15 - The Real Lesson
HELPFUL RESOURCES:
- Sports Vision NYC
- Connect with Dr. Laby on Instagram
- Pick Up a Copy of Eye of the Champion
- Download The Ultimate Sports Vision Guide for Athletes [FREE]
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