The Celtics moved quickly to fill an open roster spot Thursday after trading big man Chris Boucher then later wing Josh Minott. A league source confirmed to MassLive that the Celtics are signing two-way center Amari Williams to a two-year contract. NBA reporter Marc Stein was first to report the deal.

Boston stayed busy and two more moves materialized in the hours before the deadline, with Boston sending Chris Boucher to Utah and Josh Minott to Brooklyn. Brad Stevens pulled off one more move at the buzzer, sending Xavier Tillman to Charlotte to get the Celtics under the luxury-tax threshold.

Tonje was traded from the Jazz to the Celtics on Thursday in exchange for Chris Boucher, a future second-round pick and cash considerations, Zack Cox of the Boston Herald reports.