Personally I believe(and I heard JD mention as well) most damage is done out front, ball travels further. I don't mean reaching for the ball, and of course it depends on pitch location. Although, as a hitter you shouldn't be thinking out front too much though.. susceptible to the off speed pitch.He has some prodigious extension.
I think usually in a game the ball ends up travelling more (gets hit not SO far out in front). So usually there is more bend left in the rear arm.
The driveline article mentions that the higher the level of play the deeper in the zone it is struck on average.
Here's correa blast vid vs game. Also pitch location matters obviously.
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