In 1891, after Dr. James Nashmis invented basketball, basketball became a popular sport among the American people because of the hormonal beauty produced by muscle collision in the process of pit checking and the test of people's vision awareness, physical coordination and flexibility. Then in 1896, the world's first national basketball league, NBL, was founded, and then NBL started the history of professional basketball in the United States. However, given that the basketball rules were not perfect at that time, the sports environment was not perfect, and the organization and management institutions were not perfect, after several seasons, the organization basically announced its end.

As mentioned earlier, the NBA has become one of the top leagues in the United States, but it has not yet reached the level of influence of the current NBA. In 1976, the NBA merged with the American Basketball Association (ABA), increasing the number of teams to 22. In the 1980s and 1990s, 7 teams joined successively, and the number of league teams increased to 29. In 2004, the Charlotte Bobcats joined the NBA, bringing the total number of teams to 30.

In the 1949-50 season, the NBA had a total of 17 teams;

After merging with ABA in 1976, it increased to 22 branches;

In 1980, the Dallas Mavericks joined the NBA with 23 teams;

In 1988, the Charlotte Hornets and Miami Heat joined the NBA with 25 teams;

In 1990, the Orlando Magic and Minnesota Timberwolves joined the NBA with 27 teams;

In 1995, the Toronto Raptors and Vancouver Grizzlies joined the NBA with 29 teams;

In 2004, the Charlotte Bobcats joined the NBA, bringing the total number of teams to 30.

In 1891, after Dr. James Nashmis invented basketball, basketball became a popular sport among the American people because of the hormonal beauty produced by muscle collision in the process of pit checking and the test of people's vision awareness, physical coordination and flexibility. Then in 1896, the world's first national basketball league, NBL, was founded, and then NBL started the history of professional basketball in the United States. However, given that the basketball rules were not perfect at that time, the sports environment was not perfect, and the organization and management institutions were not perfect, after several seasons, the organization basically announced its end.

As mentioned earlier, the NBA has become one of the top leagues in the United States, but it has not yet reached the level of influence of the current NBA. In 1976, the NBA merged with the American Basketball Association (ABA), increasing the number of teams to 22. In the 1980s and 1990s, 7 teams joined successively, and the number of league teams increased to 29. In 2004, the Charlotte Bobcats joined the NBA, bringing the total number of teams to 30.

In the 1949-50 season, the NBA had a total of 17 teams;

After merging with ABA in 1976, it increased to 22 branches;

In 1980, the Dallas Mavericks joined the NBA with 23 teams;

In 1988, the Charlotte Hornets and Miami Heat joined the NBA with 25 teams;

In 1990, the Orlando Magic and Minnesota Timberwolves joined the NBA with 27 teams;

In 1995, the Toronto Raptors and Vancouver Grizzlies joined the NBA with 29 teams;

In 2004, the Charlotte Bobcats joined the NBA, bringing the total number of teams to 30.