The 1989–90 NBA season was the 20th season for the Portland Trail Blazers in the National Basketball Association. During the off-season, the Blazers acquired All-Star forward Buck Williams from the New Jersey Nets. The Blazers held a 33–13 record at the All-Star break, then posted a ten-game winning streak in March, and finished second in the Pacific Division with a franchise-high 59–23 record, and returned to the NBA Finals for the first time since their championship season of 1976–77.