| Competition: | Major Indoor Soccer League |
| Season: | 1989–90 |
| Winners: | San Diego Sockers (6th title) |
| League Topscorer: | Tatu (64 goals) |
| Matches: | 208 |
| Average Attendance: | 7,765 |
| Prevseason: | 1988–89 |
| Nextseason: | 1990–91 |
The 1989–90 Major Indoor Soccer League season was the 12th in league history.
| Div. Semi-finals: | Kansas City defeated Wichita 5-4, 4-3, 3-4, 5-4 | |
| San Diego defeated St. Louis 3-2, 3-4 (OT), 4-1, 5-4 | ||
| Div. Finals: | San Diego defeated Dallas 4-2, 1-6, 1-4, 4-2, 4-0,3-1 | |
| Baltimore defeated Kansas City 6-4, 4-2, 2-1(OT), 2-3(OT), 2-3(OT), 7-2 | ||
| Championship: | San Diego def. Baltimore 4-7, 4-3, 5-2, 4-1, 2-3,6-4 |
GP = Games Played, G = Goals, A = Assists, Pts = Points
| Player | Team | GP | G | A | Pts | |||
|---|---|---|---|---|---|---|---|---|
| align=left | Tatu | align=left | Dallas Sidekicks | 52 | 64 | 49 | 113 | |
| align=left | Jan Goossens | align=left | Kansas City Comets | 51 | 41 | 55 | 96 | |
| align=left | Preki | align=left | Tacoma Stars | 44 | 33 | 39 | 72 | |
| align=left | Michael King | align=left | Cleveland Crunch | 52 | 45 | 26 | 71 | |
| align=left | Dale Mitchell | align=left | Kansas City Comets | 48 | 47 | 23 | 70 | |
| align=left | Dale Ervine | align=left | Wichita Wings | 47 | 48 | 20 | 68 | |
| align=left | Hector Marinaro | align=left | Cleveland Crunch | 45 | 40 | 23 | 63 | |
| align=left | Branko Segota | align=left | San Diego Sockers | 44 | 27 | 34 | 61 | |
| align=left | Domenic Mobolio | align=left | Baltimore Blast | 48 | 41 | 20 | 61 | |
| align=left | Chico Borja | align=left | Wichita Wings | 43 | 24 | 35 | 59 |
| First Team | Position | Second Team | ||
|---|---|---|---|---|
| Scott Manning, Baltimore | align=center | G | Joe Papaleo, Dallas | |
| Wes McLeod, Dallas | align=center | D | Kevin Crow, San Diego | |
| Bruce Savage, Baltimore | align=center | D | Mike Powers, Dallas | |
| Preki, Tacoma | align=center | M | Tim Wittman, Baltimore | |
| Tatu, Dallas | align=center | F | Michael King, Cleveland | |
| Jan Goossens, Kansas City | align=center | F | Dale Mitchell, Kansas City |
Most Valuable Player: Tatu, Dallas
Scoring Champion: Tatu, Dallas
Pass Master: Jan Goossens, Kansas City
Defender of the Year: Wes McLeod, Dallas
Rookie of the Year: Terry Brown, St Louis
Newcomer of the Year: Claudio De Olivieria, St Louis
Goalkeeper of the Year: Joe Papaleo, Dallas
Coach of the Year: Billy Phillips, Dallas
Championship Series Most Valuable Player: Brian Quinn, San Diego
Championship Series Unsung Hero: Paul Wright, San Diego