Just a gut but I could see Pierce and Bass to the Warriors for Biendrins, Jefferson, and Barnes.
Biendrins and Jefferson both have contracts that expire after next year just like Pierce.
Just to clarify: Pierce's last year in 2013/14 is not fully guaranteed, it's a team option.
Jefferson's last year in 2013/14 is a player option. Doubtful he declines it, and passes up collecting $11 million.
Biedrins' last year in 2013/14 is an early termination option (player option). Again, doubtful he exercises it, and turns down $9 million.
So to compare financial obligations in 2013/14:
Pierce: potentially as little as $5 million, as much as $15 million
RJ and Biedrins: a combined $20 million