WEDNESDAY, 11:49am: The Grizzlies have officially signed Dooling, the team announced today in a press release. The release didn't specify that the deal was a 10-day contract, so I'd assume it's for at least the rest of this season.
MONDAY, 11:12am: The Grizzlies will sign Keyon Dooling today, tweets A. Sherrod Blakely of CSNNE.com, formalizing a move that had been rumored since Wednesday, when former New York Post columnist Peter Vecsey originally reported the story. The Grizzlies had been looking at other options in their search for a point guard, including Jonny Flynn, Scott Machado, Courtney Fortson, and Sundiata Gaines.
According to Ronald Tillery of the Memphis Commercial Appeal, the move has been held up as the team waited on the results of physical and psychological tests on Dooling, who retired after a nervous breakdown this past summer (Twitter link). Dooling had originally wanted to return to the Celtics, with whom he spent last season, but since Boston waived him following his retirement, the team wasn't allowed to bring him back.
The 32-year-old Dooling, who's averaged 7.0 points and 2.2 assists per game over his 12-year career, will give the Grizzlies some more depth at point guard. Memphis has been using rookie Tony Wroten as a backup to Mike Conley. The signing will bring the team's roster to 14 players, leaving room for one more.