There are many people with different pitching mechanics in baseball. Why pitchers work on their mechanics is because to prevent them from getting injured. If a pitcher gets injured they wouldn’t have playing time and if they don’t have playing time they wouldn’t get paid. These are the things to watch out for while throwing a ball or pitching to give you best performance without getting injured easily.
Arm Slot
Arm slot could differ for some people but some arm slots isn’t healthy for your muscles or ligaments around the shoulder or the elbow. Shoulders and elbows are the most common injury to have while throwing a baseball. The most healthy arm slot to have a 3 quarter arm slot which is an angle between a side arm and the overhand.
Wrist Snap
This technique doesn’t matter for some people but it may increase pitching velocity for ones who use this. Also this would create less pressure on the elbow and the shoulder. The disadvantage of this technique from my experience is that many off speed wouldn’t have as much movement.
Hip Rotation
This technique helps for all pitchers with different arm slots. Using this technique would give you more explosive power while pitching. This would work if this technique is used correctly, you would need to load your hip before your non-pivot foot touches the ground after the leg kick. And you would need to rotate your hip towards home plate and throw the ball.
All these technique could improve your mechanics while throwing a ball or while pitching. Also these would decrease the probabilities of getting injured.