Xtreme Soccer League
The Xtreme Soccer League was an indoor soccer league that began play in December 2008. Four teams from the former Major Indoor Soccer League participated in the first XSL season: the Chicago Storm, Detroit Ignition, Milwaukee Wave, and New Jersey Ironmen. Other former MISL teams joined the National Indoor Soccer League or Professional Arena Soccer League.
The XSL officially launched on September 16, 2008, with a press conference in Milwaukee, Wisconsin. Brian Loftin was the XSL's commissioner. Each team played a 20-game schedule beginning in December and ending in late March. There were no playoffs.
On December 3, 2008, the XSL announced that Brine would supply the Triumph X 600 as the official match ball.
Citing economic trouble, the XSL folded in July 2009. Although the league officially called it a one-year hiatus, the league never resumed play.
Teams
| Team | Stadium | City | Founded | Joined XSL | After XSL folded |
| Chicago Storm | Sears Centre | Hoffman Estates, Illinois | 2004 | 2008 | Joined USL |
| Detroit Ignition | Compuware Arena | Plymouth, Michigan | 2006 | 2008 | Folded |
| Milwaukee Wave | U.S. Cellular Arena | Milwaukee, Wisconsin | 1984 | 2008 | Joined NISL |
| New Jersey Ironmen | Prudential Center | Newark, New Jersey | 2007 | 2008 | Folded |