10:39am: The Celtics have officially announced the signing in a press release.
8:47am: Shavlik Randolph has received his letter of clearance from China and has signed a 10-day contract with the Celtics, agent Joel Bell tells Shams Charania of RealGM.com. According to Charania, Randolph is participating in the Celtics' morning shootaround today, so it sounds as if the team will announce the signing later today, making Randolph eligible for tonight's game against the Warriors.
Randolph, 29, has been out of the NBA since the 2009/10 season, when he briefly appeared in three games each with the Heat and Trail Blazers. However, as Ryan Raroque of Hoops Rumors noted last night, the former Duke Blue Devil had a tremendous season in the Chinese Basketball Association in 2012/13, averaging 32.0 PPG and 14.6 RPG in 28 games for the Foshan Long Lions.
The Celtics now have a full roster of 15 players, though three of those 15 are currently on 10-day contracts, as our 10-day tracker shows. Terrence Williams' deal is set to expire after tonight's game, while D.J. White and Randolph are locked up until next weekend. All three players landed in Boston after spending the season with Chinese clubs.
Ben Golliver of Blazer's Edge first reported yesterday (via Twitter) that Randolph was seeking his letter of clearance from China and was close to signing with an NBA team.