McMillan leaves the Seattle Sonics after four years. During his tenure, Seattle was 212-183 overall. McMillan guided the Sonics to the playoffs twice, and had an 8-8 ledger in the post-season.
He spent his entire 12-year playing career in Seattle. In 796 career games as a player, he averaged 5.9 points, 6.1 assists and four rebounds per contest.
The Sonics did not re-sign McMillan when the season ended. At that time, his four-year contract expired.
In Portland, he will replace interim coach Kevin Pritchard, who took over for the fired Maurice Cheeks at mid-season.
In the 2004-05 campaign, McMillan guided the Sonics to a 52-20 record and the Northwest Division championship. Seattle advanced to the Western Conference semifinals before losing in six games to eventual NBA champion San Antonio.