2009–10 Boston Celtics season for the twenty-first time in franchise history. The Celtics made it back to the NBA Finals after a one-year hiatus and played against the defending NBA champion and their rival, the Los Angeles Lakers. In a rematch of the 2008 NBA Finals, in which the Celtics defeated the Lakers in six games to capture their seventeenth championship, the Celtics were defeated this time by the Lakers in seven games. 2009–10 Boston Celtics season The 2009–10 Boston Celtics season was the 64th season of the Boston Celtics in the National Basketball Association (NBA). The Celtics finished with a record of 50–32,
Bill Green (basketball) work on it [the fear] and come back later." Green quit the Celtics right before the regular season began and never returned to attempt professional basketball (or any other professional sport), knowing that in order to play he would have to get over his fear of flying, which was something he could not do. Realizing that any future as a professional athlete was out of the question, Green earned a master's degree from Brooklyn College. He taught in several New York City public schools afterward, and then in 1971 became the principal of Jordan L. Mott School in the South