One last thing. When son was a junior he played in Jupiter late october ,did one camp at Miami and PG showcase in F t Myers and didn't pick up a ball until February. That was the most he ever did in off season as an uncommitted player. I don't think that this is what Cressey is referring to. These days camps continue after October. I understand recruiting takes place earlier. But you hear about pitchers going to camp after camp because they feel that someone else will get that scholarship before their son.
Cressey makes great points about the negative of young under developed bodies playing continuously at one sport and about managers managing relievers poorly , being a reliever is really tough. You get the call to get up and warm up, then shut down, the next night the same thing, then on the third night you get in, your arm is tired.
Mike Matheny does that often. I have a friend who is a cardinal fan, diehard, that just goes bonkers on that one.