Rob Manfred Details MLB's Progress With ABS Challenge System
Briefly

I think we continue to make progress on the automated ball-strike system. The technology is really outstanding. I mean, this technology is actually accurate to one-one-hundredth of an inch. So we got that piece of it down. We're now dealing with the more - I don't want to say mundane - but less-technology-based pieces of the puzzle.
How do you set the strike zone batter to batter? The system will call any geometry of a strike zone; it will call a rectangle, a circle, an oval, whatever. What strike zone should we tell it to call? That's challenging because the rule book definition of the strike zone is not what umpires actually call today.
Just one month into the ABS being used in Triple-A games, the results from Minor League testing were so positive that MLB had hopes of advancing to the next stage of testing in Spring Training.
Read at Dodger Blue
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