Record: 102-125, .449 W-L% (30th of 33) (Schedule and Results)
*Record does not reflect forfeits or vacated games.
SRS: -2.73 (18th of 33) ▪ SOS: -0.67 (17th of 33)
Regular Season Champion: Loyola Marymount
NCAA Tournament: 1 (Loyola Marymount)
Ranked in Preseason AP Poll: 0
Ranked in Final AP Poll: 1 (Loyola Marymount)
| Date | Visitor/Neutral | PTS | Home/Neutral | PTS | OT | Notes |
|---|---|---|---|---|---|---|
| Sat, Jan 6, 1990 | San Francisco | 68 | Saint Mary's (CA) | 73 | ||
| Sat, Jan 6, 1990 | Santa Clara | 71 | San Diego | 96 | ||
| Thu, Jan 11, 1990 | Saint Mary's (CA) | 61 | Gonzaga | 53 | ||
| Thu, Jan 11, 1990 | San Francisco | 77 | Portland | 75 | ||
| Thu, Jan 11, 1990 | Pepperdine | 88 | San Diego | 78 | ||
| Thu, Jan 11, 1990 | Loyola Marymount | 113 | Santa Clara | 100 | ||
| Sat, Jan 13, 1990 | San Francisco | 61 | Gonzaga | 63 | ||
| Sat, Jan 13, 1990 | Saint Mary's (CA) | 46 | Portland | 58 | ||
| Sat, Jan 13, 1990 | Loyola Marymount | 119 | San Diego | 112 | ||
| Sat, Jan 13, 1990 | Pepperdine | 70 | Santa Clara | 72 | ||
| Fri, Jan 19, 1990 | Gonzaga | 100 | Loyola Marymount | 144 | ||
| Fri, Jan 19, 1990 | Portland | 90 | Pepperdine | 88 | ||
| Fri, Jan 19, 1990 | San Diego | 76 | Saint Mary's (CA) | 65 | ||
| Fri, Jan 19, 1990 | Santa Clara | 53 | San Francisco | 51 | ||
| Sat, Jan 20, 1990 | Portland | 106 | Loyola Marymount | 131 | ||
| Sat, Jan 20, 1990 | Gonzaga | 67 | Pepperdine | 68 | ||
| Sat, Jan 20, 1990 | Santa Clara | 55 | Saint Mary's (CA) | 56 | ||
| Sat, Jan 20, 1990 | San Diego | 67 | San Francisco | 77 | ||
| Thu, Jan 25, 1990 | Pepperdine | 74 | Gonzaga | 69 | ||
| Thu, Jan 25, 1990 | Loyola Marymount | 126 | Portland | 103 | ||
| Date | Visitor/Neutral | PTS | Home/Neutral | PTS | OT | Notes |
| Sat, Jan 27, 1990 | Loyola Marymount | 99 | Gonzaga | 88 | ||
| Sat, Jan 27, 1990 | Pepperdine | 67 | Portland | 82 | ||
| Sat, Jan 27, 1990 | Saint Mary's (CA) | 64 | San Francisco | 70 | ||
| Sat, Jan 27, 1990 | San Diego | 64 | Santa Clara | 46 | ||
| Thu, Feb 1, 1990 | Saint Mary's (CA) | 119 | Loyola Marymount | 150 | ||
| Thu, Feb 1, 1990 | Portland | 55 | San Diego | 76 | ||
| Thu, Feb 1, 1990 | Gonzaga | 66 | Santa Clara | 70 | ||
| Fri, Feb 2, 1990 | Saint Mary's (CA) | 64 | Pepperdine | 88 | ||
| Sat, Feb 3, 1990 | San Francisco | 91 | Pepperdine | 100 | ||
| Sat, Feb 3, 1990 | Gonzaga | 58 | San Diego | 68 | ||
| Sat, Feb 3, 1990 | Portland | 57 | Santa Clara | 70 | ||
| Sun, Feb 4, 1990 | San Francisco | 115 | Loyola Marymount | 157 | ||
| Thu, Feb 8, 1990 | San Diego | 73 | Gonzaga | 65 | ||
| Thu, Feb 8, 1990 | Santa Clara | 53 | Portland | 78 | ||
| Fri, Feb 9, 1990 | Pepperdine | 81 | Saint Mary's (CA) | 68 | ||
| Fri, Feb 9, 1990 | Loyola Marymount | 137 | San Francisco | 123 | ||
| Sat, Feb 10, 1990 | Santa Clara | 74 | Gonzaga | 72 | ||
| Sat, Feb 10, 1990 | San Diego | 71 | Portland | 66 | ||
| Sat, Feb 10, 1990 | Loyola Marymount | 139 | Saint Mary's (CA) | 110 | ||
| Sat, Feb 10, 1990 | Pepperdine | 92 | San Francisco | 67 | ||
| Date | Visitor/Neutral | PTS | Home/Neutral | PTS | OT | Notes |
| Wed, Feb 14, 1990 | Portland | 68 | Gonzaga | 64 | ||
| Wed, Feb 14, 1990 | Pepperdine | 116 | Loyola Marymount | 131 | ||
| Thu, Feb 15, 1990 | San Francisco | 84 | San Diego | 96 | ||
| Thu, Feb 15, 1990 | Saint Mary's (CA) | 52 | Santa Clara | 84 | ||
| Sat, Feb 17, 1990 | Loyola Marymount | 123 | Pepperdine | 131 | ||
| Sat, Feb 17, 1990 | Gonzaga | 68 | Portland | 84 | ||
| Sat, Feb 17, 1990 | Saint Mary's (CA) | 61 | San Diego | 93 | ||
| Sat, Feb 17, 1990 | San Francisco | 88 | Santa Clara | 83 | ||
| Fri, Feb 23, 1990 | San Diego | 119 | Loyola Marymount | 131 | ||
| Fri, Feb 23, 1990 | Santa Clara | 67 | Pepperdine | 81 | ||
| Fri, Feb 23, 1990 | Portland | 80 | Saint Mary's (CA) | 83 | ||
| Fri, Feb 23, 1990 | Gonzaga | 76 | San Francisco | 75 | ||
| Sat, Feb 24, 1990 | Santa Clara | 81 | Loyola Marymount | 117 | ||
| Sat, Feb 24, 1990 | San Diego | 89 | Pepperdine | 102 | ||
| Sat, Feb 24, 1990 | Portland | 89 | San Francisco | 78 | ||
| Sun, Feb 25, 1990 | Gonzaga | 75 | Saint Mary's (CA) | 62 | ||
| Sat, Mar 3, 1990 | Gonzaga | 84 | Loyola Marymount | 121 | WCC Quarterfinal (LOYM declared Champion) | |
| Sat, Mar 3, 1990 | Santa Clara | 62 | Portland | 65 | WCC Quarterfinal | |
| Sat, Mar 3, 1990 | Pepperdine | 94 | Saint Mary's (CA) | 83 | WCC Quarterfinal | |
| Sat, Mar 3, 1990 | San Diego | 80 | San Francisco | 74 | WCC Quarterfinal |