The San Francisco 49ers place nose tackle Ian Williams on the physically unable to perform list.
Williams broke his leg last season against the Seattle Seahawks.
He's had four surgeries on the leg.
It was Williams' first career start when he got injured.
A former Notre Dame player entering his fourth season, Williams has played in six games for the 49ers.
Williams can be activated at any time.
Follow me on Twitter: @RavensInsider
Aaron Wilson covers the Ravens for The Baltimore Sun
DEC 12 Joel Corry
Should San Francisco decide to part ways with its quarterback, here’s how it would work.
DEC 10 Erik Oehler
Sometimes they aren't out to get you.
DEC 09 Jeff Fedotin
Anderson, Sanders, revamped O-line complement Peyton.