The Illinois Thunder were an indoor soccer club (based in Rockford, Illinois) that competed in the National Professional Soccer League.
After the 1991/92 season, the team became the Denver Thunder.
References
Year-by-year
| Year
|
Division
|
League
|
Reg. season
|
Playoffs
|
Avg. attendance
|
| 1990–91
|
2
|
NPSL
|
4th, National
|
Did not qualify
|
1,613
|
| 1991–92
|
2
|
NPSL
|
3rd, National
|
Quarterfinals
|
2,160
|
