Arm Up Too Soon?

I watched a 12 yr old pitcher pitch the other day. Before his leg gets up to his waist for the balance point his arm is already up ready to throw.

What are your thoughts on this?

Sounds like poor timing but I’d have to see him to be sure.

Arm up too early can kill momentum development in the arm. Can also lead to other problems. Some guys make it work, some don’t. If the arm action is causing the other flaws, then it’d be good to improve/tweak it. If not, then leave be. Of course, this is mostly a general response without seeing video.