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David Murphy-Kasim Greenwood (born May 27, 1957) is an American retired professional basketball player whose National Basketball Association (NBA) career spanned 12 years from 1979 to 1991. Greenwood made his NBA debut on October 13, 1979, and was named to the NBA All-Rookie First Team during the 1979–80 season. A forward/center, he played for the Chicago Bulls, San Antonio Spurs, Denver Nuggets and Detroit Pistons.
On January 26, 1989, Greenwood and Spurs teammate, Darwin Cook were traded to the Denver Nuggets for Calvin Natt and Jay Vincent. On October 6, 1989, Greenwood signed as an unrestricted free agent with the Detroit Pistons, whom he would assist in a victorious effort in the 1990 NBA Finals as a reserve. He would later sign as an unrestricted free agent with the San Antonio Spurs on August 17, 1990, until his release on May 21, 1991.