The 32-year-old veteran guard has agreed to terms with the Memphis Grizzlies  to help them in their playoff push in the Western Conference. Entering Monday, the Grizzlies are 49-24 and in a tight three-way race with Denver and the Clippers for third place in the highly competitive Western Conference.
Dooling made the announcement Monday on his Twitter page: “I am so honored to announce that I AM BACK! I am heading to officially sign w/ @MemGrizz and am looking forward to being back on the court!”
Dooling had been serving as a player development coordinator for the Celtics before accepting the offer to play with the Grizzlies on Monday. Dooling will be playing for his seventh NBA team since entering the NBA with the Clippers at the age of 20 in 2000. Dooling has averaged 7.0 points and 2.2 assists in 721 career games. He averaged 4.0 points and 1.1 assists in 46 games for the Celtics during the 66-game schedule in the 2011-12 season.
On Dec. 9, 2011, Dooling and a 2012 second-round pick were traded to Celtics in exchange for the draft rights to Albert Miralles. Then at the end of last season, Dooling re-signed with the Celtics.
But after being waived by the Celtics on Sept. 20, he decided to retire from the Celtics and accept a front office/coaching position with the team. Dooling thanked GM Danny Ainge and head coach Doc Rivers  on Monday after announcing his return.
— Keyon Dooling (@AmbassadorKD) April 1, 2013 
Dooling is also a former Vice President for the NBA Players Association.
Dooling will join former Celtics guard Tony Allen , who also welcomed him back to the NBA via his Twitter page.
@ambassadorkd . Welcome My Guy!!!
— Tony Allen (@aa000G9) April 1, 2013