How to pitch a baseball.
Most pitchers, when pitching a baseball, go through a six step delivery. They start with their hands at the zipper position, take a deep breath, and then take a small step back with their glove side foot. They then proceed by pivoting with their throwing side foot and ultimately get into a balance point position whereby they lift their glove side leg in the air.
It's very important that pitchers do not have tension in their body during this delivery. Once they're in the balance point position, their hands and arms get into what's called the high-cocking position. Also known as the flexed bow position. At which point they're going to deliver the baseball while tucking the glove side arm under their armpit and reaching as far towards the catcher as possible, extending their arm to get good extension upon releasing the ball with a flat back finish.
If you can do this, that's how you pitch a baseball.