My son's experience is similar so I would encourage your son and tell him it gets better. My son's first few outings he had mechanical issues, didn't have a lot of feel, was timid to let it go... he made it through the year but wasn't really sharp. He struggled with arm slot and a few mechanical changes that happened with his delivery. Year two is when he really felt better. I've monitored several players recoveries, due to my obvious interest, and i'd say, there were some that came right back but the majority seemed to struggle until year two, especially those that had it in high school when they were still growing and developing. Reassure him that there are better days ahead.. just keep working.