We're such a stacked team and Davis can still play 30+ minutes a game.
Why is Doc so obsessed with Davis? 
I want more Green, more JO, even more Murphy.
Green is a SF, not a C like Davis is playing.
JO just got back from injury. They need him for the playoffs. Working him back slowly is a good idea.
Murphy is out with an injury.
Therefor, the Celtics are left with Davis playing bigger minutes then we would like to see.
The key is that once the playoffs start, he drops back down to the 15-20 minute range. Long enough to help the team but not so long that other teams can exploit his weaknesses.