First put your glove on the hand that you don't write with.
Then pick up a baseball with the hand that you write with.
Grip the ball with an eagle claw.
Next square your feet and shoulders.
After that bring your arm that is holding the baseball back level with your shoulder and straight out.
Then bend your throwing elbow.
Rotate your bent arm until it is in front of your body without touching your stomach.
Now extend your arm out in front of your body.
At the same time take a step forward with your leading foot, and pivot your back foot like you're squashing a bug.
After that follow through and release the ball when your hand is directly in front of your body.
Finally, follow through your slot. This means your arm goes down and your hand touches your back.