Most HS coaches are not trainers.... most college coaches are not trainers.... that's why they have them on the staff.
HS players are not college/minor players most do not have the weight older players have. HS coaches do not have the time to really make sure that every pitcher/player is properly warmed up and to think that is a fantasy.
I do not understand why coaches would want to take the risk of injury, when you can throw in a barn . Sure during a game you might have to play in cold weather. But why not limit the times you have to thrown in the cold?
It's a fact that the body does not perform as well in the cold as it does in warmer weather. in the cold the body tries to pretect itself , tendons and muscles are not going to be as flexable.
I just feel that if you can avoid any chance of injury you should. We all remember the football players falling out in the heat of August. What happened, the powers that be made some new rules that stated if it's too hot say above 95 you cannot practice.... why not have the same rules for baseball?