The San Francisco 49ers announced on Friday that NT Ian Williams has been placed on the Active/Physically Unable to Perform List.
Williams, 24, fractured his ankle on a cut-block by Seattle Seahawks guard J.R. Sweezy in Week 2 of the 2013-14 season.
The injury prematurely ended his year after he won the starting job in training camp over former Kansas City Chief and 2008 fifth overall selection Glenn Dorsey.
Williams has had four surgical procedures on his injured foot.
San Francisco 49ers media services contributed to this story