the 1989–90 nba season was the 20th season for the portland trail blazers in the national basketball association. during the offseason, the blazers acquired all-star forward buck williams from the new jersey nets. the blazers finished with a franchise-high 59–23 record and returned to the nba finals for the first time since their championship season of 1976–77. however, they were unsuccessful in capturing their second nba title, as they fell to the detroit pistons four games to one.