Maybe if his arm is exhausted he will depend on the curve a lot more. Or any hook. Would seem dead arm would show up nor prominently on rapid ball velocity, not just about anything hooking. Professionals Talking to DailyMail.com explained the symptoms have been 'non-unique' plus they necessary more https://www.dailypioneer.com/2024/trending-news/13-student-killed-in-china-school-dormitory-fire.html