I'm just getting started here and I'm excited to get started. You're certainly off to a great start on my favorite topic (except my own son).
I'll just touch on a couple of things in this thread.
When I was with the Yankees and the Rangers before them, they were very concerned with the mental "make-up" of the players. Organizations have gotten very good at assessing physical talent and they all are looking for ways to assess the mental game. I did a fair amount of research on various paper and pencil tests that are out there and was suprised that I found one or two that I liked. Some teams use tests and some don't.
I agree that scouts focus mainly on physical skills and hope for the best on the mental. I think many of them look to cover their butts by prioritizing by the gun. If a guy throws 94 he's safe to draft -- can't argue with that number. But an 88 guy with great make-up who can really pitch is a bigger risk for the scout if he doesn't pan out.
I haven't heard for some time, but I recall hearing an avg. major league FB was 88. Anyone know what it is now?
Anyway, I find pro ball is understanding more and more that the mental game plays a huge role in performance. But also a lot of people have promised the moon with their mental training programs and the organizations are understandably once bitten twice shy. The environment on most teams is not friendly to outside people coming in and telling lifetime ballplayers and coaches how to play their game. The mental game will get bigger and bigger in pro ball and college ball and HS and youth leagues as more and better information is put out by more and better mental game coaches.
As for 100mph being a free ride, I don't know. Do it and find out!
Some people just aren't genetically able to play pro ball. Problem is you can't know if you're on that list unless you develop an awesome mental game. See what's his name, the Angels shortstop.
It takes a total package to make it and stick in the big leagues. The mental game is a huge part, and the physical gifts and conditioning are required also.
I also see the mental game like the physial game in that everyone is gifted with a certain amount of talent (some more, some less) and that wherever you are now you can get better. Some people are innately confident. You parents know that kids just come out of the womb with different dispositions.