I play basketball and want to be in the NBA one day.
That's a great goal to have! It's the best men's professional basketball league in the world! 
What are some of the top teams in the NBA?
Out of the 30 team in the NBA, the Golden State Warriors are probably the best, but I'm a Miami Heat fan! 
Who started the NBA? or when did it start?
National Basketball Association
The National Basketball Association (NBA) is a men's professional basketball league in North America, composed of 30 teams (29 in the United States and 1 in Canada). It is one of the four major professional sports leagues in the United States and Canada, and is widely considered to be the premier men's professional basketball league in the world. 
The league was founded in New York City on June 6, 1946, as the Basketball Association of America (BAA). It changed its
what is now known as the Golden State Warriors.
Pittsburgh briefly had a team in the BAA known as the Pittsburgh Ironmen, and an ABA franchise called the Pittsburgh Condors, but no NBA franchise has ever called Pittsburgh home.
In addition to the 76ers, Pennsylvania also has a few other professional basketball teams. The Erie BayHawks are an NBA G League team affiliated with the NBA's Atlanta Hawks, but the 2018–19 season will be the team's last in Pennsylvania, as it will then move to the Atlanta suburb