A theoretical baseball question

[bravos1]

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It would be pretty high...around .400 or higher. MLB hitters can all hit fastballs when they know they are coming. They would simply wait for them. Look at the MLB average when the count is 2-0, which means fastball like 80% of the time. It is up there.

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There is no way they would just sit there and wait for a fastball. They would tattoo any hanging offspeed pitch as well as a fastball.

This would not be BP no doubt about that, and there would still be some pretty decent pitchers, but runs would go through the roof. League leader would be around .500 I would guess (may seem high, but I feel it is about right). League avg overall would be up 100-150 pts and HRs would approach 100. These stats may seem absurd, but in the majors, no pitcher totally overpowers hitters, not even the Unit and the likes. Pitchers survive by mixing it up. A pitcher like Trevor Hoffman who was once one of the most dominant pitchers for a long time, would be absolutely shelled. He mainly relies on 2 pitches, fastball and change-up. If a hitter knew that it was a FB instead of a change, or vice-versa, it would be all over.

Most hitters do not want to know what is coming because it throws their timing off if they rely on the info too much and they get crossed up. That could be the difference between a brushback and getting drilled in the head by a fastball because you "knew" it was a breaking ball. Obviously the OP said the the hitter would know 100% accurate what the pitch is.

Like I said, it wouldn't be BP, but it would resemble it a bit.