...well, at least for the summer league team.  via the Herald

The Celtics also added free agent center Robert Swift to the roster. The former Oklahoma City/Seattle seven-footer, who joined the league straight out of high school, has always intrigued Ainge.

Ainge was famously enamored with Swift back when he was drafted.  (See this mock draft by Chad Ford)  Thankfully we got Al Jefferson instead and eventually turned him into KG and a banner.

I wonder if he's still doing MMA to train in the offseason.

As noted before, the other names include:

"guard Chris Lofton (University of Tennesee, Turkish league), Coby Karl (son of Nuggets coach George Karl, Boise State, Spain), Darius Washington (University of Memphis, Spurs, Czech Republic league), Bryce Taylor (Oregon, Italy), Kevin Rogers (undrafted out of Baylor) and Bryan Mullins (undrafted out of Southern Illinois)."