So you think Oakley and Mason were not trying to keep Pippen and Grant off the boards?
Of course Mason/Oakley were working on Pippen/Grant, however, it's more a focus thing.
Remember, in Riley's world, Mason/Oakley were key help defenders to Ewing. Replace Ewing with Hakeem and you get a brave new world. This is a world where one of the league's greatest offense/defensive rebounder & shot blocker are in one person.
All and all, Hakeem won't need to help his other frontmen and in return, he won't really be needing any, himself, as Cartwright and him are almost a mismatch, in terms of speed and agility.
This is where Hakeem will frustrate the Bulls, as he'll be getting putbacks, minimizing 2nd chance points, and clogging the middle from easy layouts. On his sides, Pippen and Grant will be toe-to-toe with Mason & Oakley all night long.
At the same time, he can move off Cartwright and periodically block a shot via Paxton, Armstrong, & yes, even Jordan, in and around the 10-12 ft area, and get back to Bill, without give him a wide open look.