3:19pm: The final hurdle for a deal involving Garnett and Rivers is Ainge's desire for Bledsoe to be a part of the trade, Wojnarowski hears (Twitter link).
3:08pm: If the Clippers can work out a deal to acquire Rivers, Garnett would waive his no-trade clause to join the Clippers as well, tweets Adrian Wojnarowski of Yahoo! Sports.
3:03pm: The Celtics and Clippers have begun discussing players who would be exchanged if the Celtics were to allow Doc Rivers to coach in L.A., reports Steve Bulpett of the Boston Herald. Both sides are seeking common ground, though many moving parts remain. Technically, the Clippers could only send cash and draft picks in return for Rivers, but a side deal involving current players could be worked out.
Ainge appears to be using Rivers as leverage to get the Clippers to agree to a deal involving players that they wouldn't otherwise consider, according to Bulpett. Several in the Clippers front office were wary of a trade-deadline proposal that would have sent Kevin Garnett to the Clips in exchange for Eric Bledsoe and DeAndre Jordan. Vinny Del Negro, who's no longer with the Clippers, was one of the advocates for the deal, but L.A.'s management was never really interested, Bulpett writes.
The Celtics would prefer to keep Rivers, who still has three years and $21MM left on his deal, but now that they know he's wary of staying with them for the long haul, they're considering their options. Still, Rivers remains sentimental about the C's, and hopes a win-win can happen for both teams should a deal go down. A source tells Bulpett that if the Celtics and Clippers can't work anything out, Rivers would be happy to return to Boston's bench. Another of Bulpett's sources is uncertain of Rivers' regard for the Celtics, and believes he's merely trying to massage the perception of his exit.
We heard earlier today that Rivers, Garnett and Paul Pierce would like to stay together as Clippers if they can't do so as Celtics. Pierce could wind up with the Clippers as part of a trade, or they could sign him if the Celtics release him by June 30th, since his $15MM+ salary for next season is only guaranteed for $5MM until that date.