1989–90 Kansas Jayhawks men's basketball team

The head coach was Roy Williams, who served his 2nd year at KU.

The team played its home games in Allen Fieldhouse in Lawrence, Kansas.

The team set an NCAA record for largest unranked to ranked jump.

Following the preseason NIT, where the Jayhawks defeated the 2nd, 1st, and 25th ranked teams in the nation, the Jayhawks jumped to the 4th ranked team in the nation.

The Jayhawks 150–95 victory over Kentucky on December 9, remains the most points scored in a game in Kansas basketball history and the worst defeat in Kentucky's history.