| Year: | 1990 |
| Conference: | West Coast Conference |
| Division: | I |
| Gender: | Men's |
| Teams: | 8 |
| Arena: | Gersten Pavilion |
| City: | Los Angeles, California |
| Champions: | Loyola Marymount (awarded title) |
| Titlecount: | 3rd |
| Coach: | Paul Westhead |
| Coachcount: | 3rd |
The 1990 West Coast Conference men's basketball tournament was held March 3 and 4 at the Gersten Pavilion at Loyola Marymount University in Los Angeles, California.[1] This was the fourth edition of the tournament.
During the first semi-final game on Sunday between top-seeded Loyola Marymount and #4 seed, LMU forward collapsed with 13:34 left in the first half. He had just scored a dunk on an alley-oop pass from point guard that put the Lions up He fell a short distance from Pilots point guard, attempted to get up, but shortly after stopped breathing. Transferred to nearby Daniel Freeman Marina Hospital, Gathers was pronounced dead less than two hours later; he was
The game and the rest of the tournament were canceled, with regular season champion LMU awarded the in the 64-team NCAA tournament. Seeded eleventh in the West regional, the Lions won three games and advanced to the they lost to top seed the eventual national champion.