The Bengals put Williams on the injured reserve list Monday. They promoted guard Otis Hudson from the practice squad. Hudson was a fifth-round pick last year.
Williams, a 12th-year veteran, has been the Bengals' starting right guard since 2004 and had started all 16 games in six of the last seven seasons. He was suspended for the first four games this season for violating the NFL's policy on performance-enhancing substances. He said he took an over-the-counter diuretic that is banned under the league policy.
Copyright 2011 by The Associated Press.