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It could get even more wild. I could imagine batters having custom profiles for different pitchers. E.g. one bat for when hitting against someone who throws 100MPH four seam fastballs, and another when facing someone who throws 90 MPH cutters.

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I'm fine with it as long as they don't change bats in between pitches.

I'm picturing a caddy standing off to the side of the batter with a bag full of bats, sizing up the last pitch and say "May I suggest the pine with the conical twist sir?"

That’s air golf at that point

A caddy? How about an instant 3D printer\CNC machine?

They are not fast enough and there is no reason to think machining ever will be.

If you find yourself in Louisville, Kentucky, you can see how they make bats at the factory. At least 20 years ago, it was already pretty automated. They put the blanks on a copy lathe and turn out bats from a template.

Sanding and finishing are subsequent steps.

I mean that's part of baseball as chess (or poker), right? The batter swaps to the fastball bat, communicating that they expect a fastball. The pitcher knows, from the coach's extensive scouting, and swaps to the curve. But actually, the batter knows he struggles with that kind of fastball and was hoping to bait the curveball, which he's more confident swinging against, and is happy to use a slightly suboptimized bat.

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