TheÂ Boston Celtics appear willing to make major roster changes to balance a chance for a championship run and future financial flexibility. TheÂ Celtics offeredÂ Ray Allen andRajon Rondo to theÂ Detroit Pistons for a package that includedRichard Hamilton,Â Tayshaun Prince andÂ Rodney Stuckey, league sources told Yahoo! Sports. Boston general manager Danny Ainge and Detroit’s Joe Dumars never spoke, but rather theÂ Celtics had a lower-level executive make the pitch to aPistons official over the past weekend, league sources said. Detroit immediately rejected the idea, and it never advanced to the two top executives speaking about particulars. This isn’t an uncommon occurrence for a GM like Ainge to dispatch an underling to make that kind of a call, if for no other reason to give the top executive some level of deniability that he’s shopping his stars.