2:00 pm: Williams’ new deal is official, per NBA.com’s transaction log.
1:01 pm: The Celtics are promoting rookie two-way player Amari Williams, Marc Stein of The Stein Line tweets. Williams has agreed to a two-year, $2.7MM standard contract.
It’s uncertain if Williams is getting quite that much, as a two-year, minimum-salary contract for a rookie as of today would be worth $2.64MM, though it’s possible the Celtics will give him slightly more using the taxpayer mid-level exception.
Williams was selected with the No. 46 overall pick last June. He was technically drafted by the Magic, who forwarded him to Boston in a draft-night deal.
The 6’11” big man has seen action in 13 games, including two starts, averaging 1.7 points and 2.1 rebounds in 8.2 minutes. He’s spent a majority of his rookie campaign with the G League’s Maine Celtics, where he’s averaged 15.3 points, 11.3 rebounds, 5.0 assists and 1.7 blocks in 30 minutes per game while appearing in 21 contests.
Boston dealt Chris Boucher to the Jazz on Thursday, opening up a spot for another frontcourt player to move up the depth chart.

Nice….dudes gonna be a system/role player at some point for the Celts. The way Boston gets the best out of and develops guys. I’m sure Williams will be another diamond in the rough.
He’s shown flashes. It will be good for him to practice against NBA guys and get some junk minutes in games. You could do much worse for a 14th or 15th man than him.
Amari looks good to me! Hope he keeps coming on. He caught Hauser’s full court pass which led to that miracle win against the Nets. So good hands. Read he’s a terrific passer. Young & looks huge on the court on tv. Needs an offense.
Oh, and now we have 4 centers. We’re good to go.