I have no idea what could be the hangup at this point (see update below) but apparently the deal still hasn't been filed with the NBA because, contrary to an earlier report, it hasn't been fully agreed upon yet.
According to a league source, the NBA is still waiting for a final proposal from the Celtics and Clippers on a deal that would send Doc Rivers out west for a first round draft pick. A second source said that there's a good reason - though both sides were thought to have reached agreement last night, the deal still hasn't been finalized. "Not done. Looks like it will get done eventually. Don't know when. No trade call yet nor scheduled yet," the source just said via text message.
So the infamous press conference is pushed back even further.
No Rivers press conference tonight. Negotiations ongoing. There's always tomorrow...— Mark Murphy (@Murf56) June 24, 2013
Holdup on Celt-Clips deal is Rivers finishing contract details. Wants it ironclad. Wary of Clippers? Shocking, I know.— Steve Bulpett (@SteveBHoop) June 24, 2013
Doc Rivers has signed his contract with the Los Angeles Clippers, league source tells Y! Sports.— Adrian Wojnarowski (@WojYahooNBA) June 25, 2013
Press conference scheduled tomorrow to introduce Doc to LA.