Tags: Soccer League, Sports League.
The National Professional Soccer League was a professional indoor soccer league in the USA. It started out as the American Indoor Soccer Association in 1984 but changed its name to the National Professional Soccer League in 1990. During the summer of 2001 the league disbanded and the six surviving teams formed the second version of the Major Indoor Soccer League.When the league began in 1984 game rules were almost identical compared to the larger and more popular MISL.