49ers' Ian Williams goes on injured reserve
SANTA CLARA, Calif. (AP)
Williams, a three-year veteran who made his first career start against the Seahawks, has played in six games and has 11 tackles. He originally joined the team as an undrafted free agent out of Notre Dame in 2011.
The 49ers also signed fullback Owen Marecic to a one-year contact on Tuesday.
Marecic played for 49ers coach Jim Harbaugh at Stanford.