The Rampage were originally owned by Pro Soccer International, a group managed by Michael O'Flaherty and
Oscar Albuquerque, a former member of the former
National Professional Soccer League's
Illinois Thunder and the 1980 Canadian Olympic qualifying team. On October 7 and 8, 2006, try-outs were held for the then
Rockford Thunder at the ISC. 24 players arrived from various soccer backgrounds. Some had played locally with the Rockford Raptors, but other players had played in various leagues including:
Segunda división mexicana,
Tercera División de México,
Primera División Uruguaya,
2 Liga Polska,
USL First Division, and
Premier Development League (PDL). On March 10, 2007, after defeating the
Cincinnati Excite 5-4 with a late goal by Ante Cop, the Thunder secured a position in the AISL finals to face the
Massachusetts Twisters. On March 31, 2007, the Thunder traveled to
West Springfield, Massachusetts for the AISL Championship. The Twisters claimed the championship winning 11-5. On August 7, 2007, the AISL announced that the
Thunder had changed their name to the
Rampage. This is most likely due to the
Texas Thunder of the
National Pro Fastpitch moving to Rockford. The Rampage finished the 2007/08 AISL regular season with a 12-1 record. They defeated the
Massachusetts Twisters 18-5 in the AISL championship game at home on March 15, 2008. On September 9, 2008, the Rampage announced they were joining the new
National Indoor Soccer League for its inaugural season in
2008-09. They finished with a 10-8 regular season record, qualified for the playoffs, defeated Monterrey in the playoff semifinals, but lost to Baltimore 13-10 in the NISL championship game. On July 7, 2009, it was announced that the Rockford Rampage acquired the Chicago Magic youth soccer club and its nationally recognized Development Academy and structured them as a non-profit organization. On August 21, 2012, the Rampage joined the
Professional Arena Soccer League for the 2012-2013 season. The team folded after that season. ==Year-by-year==