I just checked ( NBA.com - Referee Assignments
) and you're right. I went out on Google and didn't see anything about retirement. Since this nba.com website is posted close to 9am the day of the scheduled games, we'll just have to keep looking, unless someone else knows anything.
"I'm always amazed to hear of victims so badly mutilated that they have to be identified by their dental records. What I can't understand is, if they don't know who you are, how do they know who your dentist is?" - Paul Merton