Weird Arm Pain when throw hard?

I know someone that is having a weird almost shooting arm pain when they throw hard sometime. Is that a growth thing with the soft tissue because the growth plate isn’t closed. If have had that once and a while too and it never felt like an injury it just happened at release and as soon as I released the ball.

What could that be? Is that because the soft tissue and growth plates aren’t closed?

Need Help for a freind and it sometimes happens to me.

EDITED BY ADMIN - Improper language will not be tolerated.

LOL that isn’t the problem I think it is rushing once and a while so over throwing that causes the pain.