I've posted the first follow-up article to my UCL article from two weeks ago.  I've brought up some new words and concepts, but I'm sure I haven't explained all of them well enough.

My goal is to make my articles as easy to understand as they can be without writing gigantic 3,000 word articles.

Here's the link: Delayed Internal Rotation: Performance Implications

Here's a brief excerpt from the article:

The rotational mechanics involved in over-hand throwing strongly indicate that the kinetic chain functions more efficiently when internal rotation is delayed until after arm extension.  This means that less energy is wasted on movement that doesn't directly contribute to pitch velocity.

Paul Nyman and Dr. Mike Marshall both agree on the principle reason behind delaying internal rotation - to utilize the triceps muscle as a key link in the kinetic chain.