Do any of you pitching gurus out there have a theory on this? Is it just dumb luck? Certainly over this period of time there have been many pitching coaches with different philosophies come and go in each organization.
I think that it is in part due to proper stretching and conditioning and in part due to dumb luck. The sad fact is that most big league pitching coaches don't know how to address this problem. They actually know far less about the physical act of pitching than you think that they do or should. This slavish reliance upon pitch counts, as if that's going to save an arm, is ludicrous. I understand the reticence about overuse of a pitcher who has a big contract or high ceiling, but at some point, it is a self-fulfilling prophesy-the less you're used, the greater the risk.
Pitchers take about 48 hours to recover from a full pitching outing (by that I mean over 100 game pitches). Then they should be throwing bullpens. And all this malarkey about long-toss or weighted baseballs being solutions also is bunk. However, there are lots of so-called pitching gurus out there who are committing malpractice for pay every day on ball yards across the country. I'd love to see the TJS stats on Japanese professional teams, because they throw the shit out of their pitchers. I strongly suspect that their experience is different.