He is a "Causwell" player, named after Duane Causwell.
A seven footer with no NBA basketball game whatsoever, these players are often called "athletic shotblockers" who can rebound a bit, but have never understood how to fit into the offensive side of the game.
These are NOT players you should ever label as having 'potential', or even 'underachieving'. They have no potential to reach and will never achieve any more then what they had when originally brought into the League.
These are guys who really have no interest in basketball itself, but grew very tall and everyone else expected them to automatically like the game because of that.
And who really just could not ignore getting so much money for just being seven feet tall.
BTW, the Kings signed 6'11" Jamal Sampson, Ralph's cousin, this summer, so it will look like the Kings have addressed their front line size issue in the team photo.