Commit to an off season strength and throwing program. I caution you to make sure the instructor and club program are dialed into the strict protocols you have to follow to get the benefit and avoid injury. My son has benefited immensely from both; he was taught the specific moves and follows them religiously. IF velo has gone from 76 to 84, then 84 to 88 the past two years. His size has gone from 155lbs to 171lbs and 5'8 to 5/10 just for reference. He's a 2018