The Boston Celtics dropped a close preseason game to the Brooklyn Nets 82-80 but got to catch up with an old friend before the game.Former Celtic Paul Pierce visited the Celtics locker room before the game and then went out and helped his new team beat Boston. Pierce only scored 4 points but grabbed 10 rebounds and dished out 5 assists.The Celtics were led by Courtney Lee's 14 points, Kris Humphries and Jeff Green each added 12.Check out the video of Pierce visiting the Celtics locker room below.