Historical NBA Transactions on May 21
Transactions listed are from the 1946-47 through 2012-13 BAA/NBA
Click on the Team for team roster and
Click on the Player for career stats and
May 21, 1991
The San Antonio Spurs waived Dave Greenwood.
May 21, 1980
The Seattle SuperSonics traded Paul Silas (coach) to the San Diego Clippers for a 1985 2nd round draft pick (Calvin Duncan).
May 21, 1950
The Chicago Stags sold Frankie Brian to the Tri-Cities Blackhawks.