Why mess with success?
Sure, if this were the Pats i'd say go for it! then again...those aren't guarenteed contracts.
Obviously the Celts have the veteran leaders in town to keep guys in line, but Stephon marbury isn't right in the head...really, he's just not. The guy thinks he's god's gift to basketball -- he's mentioned, several times now, that he'd be willing to go over to Europe and pull a "Beckham." Does anyone really think that, if Marbury went to Europe, he would be doing the NBA a great justice? When Beckham came here, he was supposed to rekindle soccer in the United States....i got news for you Stephon, basketball in Europe doesn't need Starbury to get kick started - it's already well on its way and there are plenty of ball players over there already who are more skilled than you are at this point in your career.
After many years in the leauge, most athletes begin to sacrafice personal gains for a shot at a championship. Does anyone believe that Stephon is ready to sit on the bench for 35 minutes a game and watch Rondo (a guy who Stephon probably thinks he's still better than) go through the learning process? Do you think Stephon will jump around on the bench like a cheerleader every time someone makes a play -- ala Eddie $$ and the rest of the guys?
Keep Marbury out of Green.