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Whatever the outputs, though, ABS is far superior to human umpires in one key way: It calls pitches based on where they cross the plate, where they go past the batter, rather than based on what the catcher does. This alone makes ABS better than what we have now, because ABS calls pitches. In modern baseball, home-plate umpires don’t call pitches, they call catches.
Let’s repeat that.
ABS calls pitches, umpires call catches.
Let’s repeat that.
ABS calls pitches, umpires call catches.