My guess is Shaq won't play tomorrow, but Tuesday. We shouldn't need him against the Pistons anyway (you never know with this team lately, though), so instead get him an extra day of rest. A Tuesday return will help him get somewhat back up to speed before the game against the Bulls afterward.
The team used to go to Shaq a lot to open up games.. Maybe Shaq taking some of the load off our guys early will help us close these games out better.