I'll just go ahead and state the obvious. Hayes has 3 things that he needs to work on. Preferably in the G-League.
1. Understanding the defense along with positioning - He is ball watching trying to get the big block. This allows the man that he's covering to get deep position which negates his defensive advantage.
2. He depends upon his athleticism too much - sometimes he doesn't seem to be in full control of his body defensively. This is the same problem that Diallo had. Once he understands how to jump straight up in the air and not foul. He will be a BEAST.
3. Develop a dependable post game - With his quick bounce I would love to see him develop a right/left hand hook. He has a nice form to his jumper so developing consistency is a must.
25 lbs of muscle would be nice