Mychal Thompson was a fixture in the Portland lineup for eight years (though one season was missed due to injury), where he started at both power forward and center positions (depending on other personnel). He was named to the 1979 All-Rookie team, and had his statistically best season in 1981-1982, where he averaged over 20 points and 11 rebounds per game. In the 1986 off-season, Thompson was traded to the San Antonio Spurs in exchange for center/forward Steve Johnson.
Thompson played with the Spurs for over half a season, before he was traded again, this time to the Los Angeles Lakers. He was brought to the Lakers in mid-February in 1987 to defend Celtics forward Kevin McHale whom he played great defense against, and to back up Kareem Abdul-Jabbar. Thompson helped the Lakers win consecutive titles in 1987 and 1988. He retired in 1991.