High Quality Content by WIKIPEDIA articles! The Major Indoor Soccer League was the top professional indoor soccer league in the USA. The league was a member of both the United States Soccer Federation and FIFA. The MISL had replaced the NPSL which folded in 2001. According to MISL.net, the league has ceased operations as of May 31, 2008. "We are considering structural changes that will bring us greater efficiencies, while also allowing long term growth and expansion of the League," said John Hantz, former Chairman of the MISL, and Owner/Operator of the Detroit Ignition. All the teams from MISL went to the new indoor leagues: NISL, PASL-PRO and the XSL. The NISL and XSL used the same playing rules as the MISL.