I’m a varsity pitcher with a fastball, curveball, and changeup. My fastball is mid 80’s and I’d appreciate any tips that you have.
I like your arm action/speed…in an unabashed biased shameless plug 
Go to the logs forum and read Lankylefties log. In it he takes on issues that are right in your way right now. Conditioning, diet, attitude, sacrifice, tactics, intent and focus.
I don’t necessarily want you to “copy” him…he is having a dream run and it will help you see what it will take
Haha I’ll check it out, thanks a lot man.