The last time the Boston Celtics had roster turnover like they did this year, they won a championship.
Now let me just say right away that the turnover going down on the 2007-08 Celtics was a very different situation, and that we should in no way assume it's going to play out the same way. That roster turnover happened because two of the players joining the roster came on board via mega-trades. Those trades - Jeff Green, Wally Szczerbiak, and Delonte West for Ray Allen and Glen Davis in the first deal, and Ryan Gomes, Gerald Green, Al Jefferson, Theo Ratliff, and Sebastian Telfair for Kevin Garnett in the other - shipped out eight players for just three, seven of whom had played for the team the previous season.