Williams, 27, is 6-foot-3 and went undrafted by the NBA out of Northeastern in 2017. His first pro season was spent with the Greensboro Swarm.
Since then, he has played internationally, including stints in Puerto Rico, Israel, Italy and Belgium.
He most recently averaged 10.3 points with Israeli club Maccabi Rishon LeZion. He parted ways with the team on Oct. 28 after appearing in three games.