I injured my shoulder at 17 and Im an adult now.
I threw the ball overhead and that was the cause.
shoulder rattling when I internally rotate my straight arm like that.(especially when relaxed)
no pain if I dont use it but it is pretty annoying when I do deadhang pull ups and very weak compared to the other one.
went to several orthopedic surgeon and they said just let it be if it doesnt hurt.
Do you know what this symptom is by experience or by any means?