The Boston Celtics won the NBA Championship for the 2007-08 season, after defeating the Los-Angeles Lakers in the NBA Finals. The Celtics won the series 4 games to 2.
They won it in 2008.
Because he help winning the championship in 2008 NBA basketball
the Boston Celtics
The Boston Celtics and Los Angeles Lakers played in the = 2008 NBA Finals =
The Boston Celtics
Yes, for the 2008 championship win over the Lakers.
As of the start of the 2007-2008 season, the Dallas Mavericks have never won an NBA championship.