Willams has come under fire recently for the Nets recent poor play and has been battling a myriad of injuries. Wednesday's game against the Bucks is his first missed game of the season and C.J. Watson will start in his place.
Rookie Tysawn Taylor is also expected to get some minutes.
As of right now, there is no announced timetable for Williams' return, but since the announced injury is a bruise, it's fair to expect that he'll be day-to-day. The Nets will also be without Kris Humphries, who has a mild abdominal strain.