- July 29, 2003
Signed Marquis Daniels as a free agent.
- August 18, 2003
Traded Evan Eschmeyer, Avery Johnson, Popeye Jones, Antoine Rigaudeau and Nick Van Exel to the Golden State Warriors for Danny Fortson, Antawn Jamison, Chris Mills and Jiri Welsch.
- August 22, 2003
Signed Travis Best as a free agent.
- September 5, 2003
Waived Antoine Rigaudeau.
- October 20, 2003
Traded Raef LaFrentz, Chris Mills, Jiri Welsch and a 2004 1st round draft pick (Delonte West was later selected) to the Boston Celtics for Tony Delk and Antoine Walker.
- January 6, 2004
Signed Mamadou N'Diaye to the first of two 10-day contracts.
- January 30, 2004
Signed Scott Williams as a free agent.
- June 24, 2004
Traded Antawn Jamison to the Washington Wizards for Devin Harris, Christian Laettner and Jerry Stackhouse.
Traded Vassilis Spanoulis to the Houston Rockets for Luis Flores.
Traded a 2005 1st round draft pick (Linas Kleiza was later selected) to the Utah Jazz for Pavel Podkolzin.
Drafted Vassilis Spanoulis in the 2nd round (50th pick) of the 2004 NBA Draft.