The NBA wasn't founded until 1946. It was known as the BAA (Basketball Association of America) until 1949, when it merged with several teams from the NBL (National Basketball League.) The NBL was founded in 1937.
The Miami Heat won the 2013 NBA finals.
The Miami Heat won the NBA Finals in 2006.
The Boston Celtics won the 1984 NBA Finals.
The Lakers won the NBA finals in 1988
The Boston Celtics won the 1986 NBA Finals.
The Detroit Pistons won the 1989 NBA Finals.
The San Antonio Spurs won the 2003 NBA finals
The Los Angeles Lakers won the 1980 NBA Finals.
The Los Angles Lakers won the 2010 NBA finals!
the cavs have never won the nba finals
The San Antonio Spurs won the 2003 NBA Finals.
In 1920 there were no NBA Finals. The NBA Finals officially started in 1947.