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It helps you develop your approach to hitting. by tex29

For example, it could reveal patterns in the way pitchers typically approach certain hitters or profiles of hitters, or the pitches and locations a hitter is likely to face situationally. If, for example, a hitter were to learn that a particular pitcher throws a fastball down and away 90% of the time when faced with a 2-2 count, that would be extremely useful for the hitter.

It also can help players develop better plate discipline by learning the expected results associated with pitches they frequently face in a particular zone. It’s one thing to tell a hitter you have noticed he struggles with pitches up and in, and he should try to avoid swinging at those pitches unless faced with two strikes. It’s another to be able to provide irrefutable data showing the likelihood of an unsuccessful plate appearance if he swings at pitches in that zone. Moreover, being able to identify and distill patterns based on data can help identify specific areas for improvement, and perhaps suggest drills or mechanical adjustments that might address those weaknesses.

In addition, technology and analytics can help hitters develop a better understanding of the strike zone while practicing, as well as provide useful information about hitting mechanics. For example, what is the frequency with which the hitter makes contact out in front of the plate? What are the expected outcomes in those cases? In other words, maybe the hitter’s swing is fine, but perhaps he’s struggling with timing. Technology can also help you explore and identify issues with balance, efficient weight transfer, swing-angle, etc.

Again, I’m not suggesting technology and analytics should replace good coaching; I’m suggesting technology and analytics can help facilitate good coaching.