Jun 30, 2005

• The Boston Celtics exercised their Team Option on the contract of Justin Reed to extend his contract.
  

Jun 28, 2005 - The 2005 NBA Draft took place in New York.

• The Boston Celtics selected Ryan Gomes in Round 2 with Pick 20 in the 2005 NBA Draft.
  
• The Boston Celtics selected Gerald Green in Round 1 with Pick 18 in the 2005 NBA Draft.
  
• The Boston Celtics selected Orien Greene in Round 2 with Pick 23 in the 2005 NBA Draft.
  

Mar 4, 2005

• Gary Payton signed a contract with the Boston Celtics.
  

Feb 24, 2005

• The Boston Celtics sent Tom Gugliotta in a trade to the Atlanta Hawks.
  
• The Boston Celtics sent Gary Payton in a trade to the Atlanta Hawks.
  
• The Boston Celtics sent Michael Stewart in a trade to the Atlanta Hawks.
  
• The Boston Celtics sent Jiri Welsch in a trade to the Cleveland Cavaliers.
  
• Antoine Walker was acquired in a trade by the Boston Celtics from the Atlanta Hawks.
  

Feb 8, 2005

• The Boston Celtics sent Walter McCarty in a trade to the Phoenix Suns.
  

Oct 28, 2004

• The Boston Celtics exercised their Team Option on the contract of Jiri Welsch to extend his contract.
  

Oct 27, 2004

• Steven Barber, previously with the Boston Celtics, became a free agent.
  
• Ernest Brown, previously with the Boston Celtics, became a free agent.
  

Oct 25, 2004

• The Boston Celtics placed the contract of Steven Barber on waivers.
  
• The Boston Celtics placed the contract of Ernest Brown on waivers.
  

Oct 4, 2004

• Rick Fox, previously with the Boston Celtics, became a free agent.
  

Oct 1, 2004

• Steven Barber signed a contract with the Boston Celtics.
  

Sep 30, 2004

• The Boston Celtics placed the contract of Rick Fox on waivers.
  

Aug 27, 2004

• Justin Reed signed a multi-year contract with the Boston Celtics.
  

Aug 16, 2004

• Tom Gugliotta signed a contract with the Boston Celtics.
  

Aug 13, 2004

• The Boston Celtics sent Jumaine Jones in a trade to the Los Angeles Lakers.
  

Aug 6, 2004

• The Boston Celtics sent Chucky Atkins in a trade to the Los Angeles Lakers.
  
• Rick Fox was acquired in a trade by the Boston Celtics from the Los Angeles Lakers.
  
• Gary Payton was acquired in a trade by the Boston Celtics from the Los Angeles Lakers.
  

Jul 14, 2004

• Mark Blount signed a multi-year contract with the Boston Celtics.
  

Jul 2, 2004

• Tony Allen signed a multi-year contract with the Boston Celtics.
  
• Al Jefferson signed a multi-year contract with the Boston Celtics.
  
• Delonte West signed a multi-year contract with the Boston Celtics.
  

Jul 1, 2004

• Dana Barros, previously with the Boston Celtics, became a free agent.
  
• Mark Blount, previously with the Boston Celtics, became a free agent.
  
• Chris Mihm, previously with the Boston Celtics, became a free agent.