I don't take your comments as incendiary at all. Thank you for offering me the opportunity to clarify myself. First off, I have extremely high regard for Greg Maddux, both as a pitcher and as an individual. On top of immense physical skill he is also a whole lot smarter than the average bear, and a class act to boot.
Regarding my earlier statement about please note these words very carefully: "in a pure biomechanical sense." Several of the things he does, mechanically, are damaging. He does enough right, by actively pronating pitch releases, to mitigate most of the damage to his elbow and front of his shoulder. However, longterm I suspect he has compromised his elbow range of motion. We wouldn't know that without measuring. Second, from a biomechanical standpoint, when he levers his bodyweight out over his glove-side knee, many times I observe that he hyperextends the knee. The cumulative damage from this is problematic. At the same time he levers outward over the knee he puts force on his left hip in a way that is causing cumulative damage. Some of the pitches I've observed show that, at times, he gets enough upper body rotation to take unnecessary stress off the back of the shoulder, at other times he doesn't. There are other details as well that lead me to make my statement. Anatomically (and kinetically) there are substantial flaws in what he does, from a purely biomechanical perspective. In spite of these things what he has accomplished is stunning.
The single thing he does that differentiates him from almost everyone else is that he ACTIVELY pronates pitch releases. I am positive this is the single dominant biomechanical factor that contributes to his longevity and durability. It's also why his pitches move late and hard.
This is also basically what Marshall did when he threw professionally. While you are correct that Marshall was injured, his injury is very unique. He pulled a rib off of the sternum. This was caused by attempting to throw a conventional curveball while pronating the end of the release. If you understand the forces required for this specific set of movements, while throwing a pitch, you understand that he contracted the pec so hard that he ripped a rib loose. Biomechanically that's awful. This injury led him, years later, to develop a very different curveball release...the one he now teaches.
What I'm talking about is a biomechanical ideal, in part theoretical. But if someone, anyone, does not look to the future we are doomed to repeat the past. Have you heard the acronym TINSTAAPP?...There Is No Such Thing As A Pitching Prospect. If you look at the literal pile of busted wings that MLB is built on, the phrase rings true. I think it's wholly inappropriate to look at an example like Greg Maddux and say 'that's as good as it can get.' The vision of the possibility the something might be better, one that doesn't damage the majority along the way, is what drives me.
Whether you agree with me or not, I hope that my statements restore a bit of the credibility you seem to see as wavering. Thank you for the opportunity to clarify.