This trade comes from rumours read:
Source: Grizzlies Shopping Zach Randolph? from HoopsWorld
Blatche rumours were present a couple of days ago
Peja is not staying long term in TOR
WSH has an abundance of SF's
MEM: gets a young player in Blatche to fill in the PF role. Randolph is expecting Pau Gasol money, not going to happen in MEM with Gay and Conley on board and Gasol waiting to be resigned. Moving Mayo also saves money. They get Thorton back at SF as MEM has little depth behind Gay there. TOR throws in some cash as Peja probably gets bought out unless MEM makes a run at the playoffs that Heisley promised the fans. It would appear chemistry appears to be the problem in MEM this year with Z-Bo feeling unappreciated with no contract extension.
WSH: loses Blatche's contract, gains a 20/10 guy who is expiring, can absorb the extra salary this year as they are well under luxury tax. WSH has 3 C's currently besides McGee. Throw MIA first round pick to WSH from TOR as well.
TOR: After Jan. 20 Peja can be traded with others at which time the Raps throw in DD or Weems to WSH as they have nothing at SG after Young and (arguably) Hinrich (more of a PG). TOR does make out like bandits here, IMO, and this is probably unrealistic but the needs of the other 2 teams are met, IMO. McGee gives Raps a true C. Mayo provides another real offensive threat and step up over DD. Yi is only a throw in to make numbers match up. TOR uses their draft pick for a wing/SF.
TOR has about $51M tied up in following roster for next year:
PG: Calderon, Bayless
SG: Mayo, Barbosa
PF: Bargnani, Davis
C: McGee, Johnson, Alabi
Here is another way to make it work:
Other pieces would need to be involved though to have less than 15 players on each roster and more than 13. But that is the jist of it. Essentially DD or WEems goes to WSH.