The 1981 NBA World Championship Series was the championship round of the National Basketball Association (NBA)'s 1980–81 season, and the culmination of the season's playoffs. It pitted the 62–20 Eastern Conference champion Boston Celtics against the 40–42 Western Conference champion Houston Rockets. This series has the distinction of featuring for the third time in NBA history, and last to date, a team with a losing record in the Finals. They were the first team since the Minneapolis Lakers in 1959 to reach the championship round despite having more regular season losses than wins. This, along with 1986 (which was also played by the Celtics and the Rockets), was one of the only two NBA championships of the 1980s not to feature the Lakers. Background Houston Rockets Prior to the season, the NBA moved the Rockets and San Antonio Spurs from the Central Division of the Eastern Conference to the Midwest Division of the Western Conference. The Rockets and Spurs traded places with the Chicago Bulls and Milwaukee Bucks. The Midwest Division also took in the expansion Dallas Mavericks. The Rockets that season were led by Moses Malone, who practically carried the Rockets to the NBA Finals. Meanwhile, Calvin Murphy, the shortest player in the league at the time, set two NBA records, sinking 78 consecutive free throws to break Rick Barry's mark of 60 set in and achieving a free-throw percentage of .958, breaking Rick Barry's record set with the Rockets in . Other key contributors of the 1980–81 team were Rudy Tomjanovich, Robert Reid, Mike Dunleavy Sr., Allen Leavell, Billy Paultz, Bill Willoughby, Calvin Garrett, Tom Henderson, and Major Jones. The Rockets clinched the last spot in the playoffs on the final night of the regular season following a loss by the Golden State Warriors to Seattle, as Golden State had the tiebreaker over Houston. Houston tied with Kansas City for second place in the Midwest behind San Antonio with a regular season record of 40–42 (this would be only the second time that an NBA team with a losing record would make the Finals, after 1959). Houston's playoff run began by drawing the defending NBA champion Los Angeles Lakers and Magic Johnson in the first round. The Rockets upset Los Angeles, two games to one, with the Rockets winning both games in Los Angeles. The Western Conference Semifinals matchup featured the Rockets against the Spurs and multi-year scoring