I’ll leave it to others who are deeper into the bio-mechanics of softball pitching, but that does not track with my understanding of the kinematic sequence (which is happening in context of linear energy being redirected into rotational energy):
1. Hips (seek stride foot angle and stop)
2. Shoulders (lag hips creating stretch reflex; ultimately seek hip angle and stop)
3. Upper arm (rotates internally and compresses against rib cage at about 8 o’clock)
4. Lower arm (rotates internally and whips through the release zone, including brush contact from about 8 o’clock to 6 o’clock)
5. Forearm/hand internally rotate (pronate) after release and arm unloads