There are ongoing threads that have explored some of the ideas that Dr. Marshall, who won the Cy Young in 1974, has developed regarding pitching arm injuries and his biomechanical solutions for eliminating these injuries. (You might also recall that my son, drafted in 2003, is currently training with Marshall.)
I spoke with Dr. Marshall yesterday and am aware that he has now released a video that details his research. For those of you who are interested, you can find more information about this 2 1/2 hour video on his website:
I saw rough edits of this video when I visited Dr. Marshall in January. It clearly shows why conventional pitching mechanics injure the arm, using high speed film research he has done for almost four decades. You will also see x-rays of youth and adult pitchers that show the bone damage done by pitching. He also provides a clear teaching methodology for teaching a pitching mechanic that eliminates pitching injuries as we now know them. The video also includes major league game footage of two pitchers who threw using at least portions of what he now advocates.
If you have a son who pitches I strongly recommend that you view this video.