Hey BBDAD13 - Although I have never heard of a 2nd Hamate surgery to remove a regrowth of the hook of the hamate bone I do know it can be a maddening issue to work through. I have extensive knowledge in the battling thru and recovery of the injury. So much, that I've developed a patented product to assist in getting thru a season with hamate issues and recovery after surgery.
I'd be happy to send you some product for free for your son...
Shoot me a PM
Orlando2022Dad