FILE: Don Nelson, who won five NBA titles as a player with the Boston Celtics, and went on to be named Coach of the Year three times, has died at the age of 86. 26 Feb 2001: Head Coach Don nelson of the Dallas Mavericks reacts to the action during the game against the Los Angeles Clippers at the Staples Center in Los Angeles, California. The Mavericks defeated the Clippers 103-92. NOTE TO USER: It is expressly understood that the only rights Allsport are offering to license in this Photograph are one-time, non-exclusive editorial rights. No advertising or commercial uses of any kind may be made of Allsport photos. User acknowledges that it is aware that Allsport is an editorial sports agency and that NO RELEASES OF ANY TYPE ARE OBTAINED from the subjects contained in the photographs.Mandatory Credit: Christopher Ruppel /Allsport