UPDATE (2:45 p.m. on Tuesday) -- The 49ers announced they have signed wide receiver Kassim Osgood to a one-year contract and placed nose tackle Glenn Dorsey on injured reserve/designated for return, as Insider Matt Maiocco reported earlier.
Dorsey will not be eligible to practice with the team until at least six weeks have passed, and cannot be activated until at least eight weeks have passed.
Coach Jim Harbaugh said he expects veteran special-teamer Kassim Osgood to return to the 49ers' 53-man roster on Tuesday.
Harbaugh said on his KNBR radio show that he anticipates Osgood being back on the team with the likelihood that nose tackle Glenn Dorsey will be placed on injured reserve/designated for return. That move would create a roster spot for Osgood's return. Osgood was among the 49ers' final cuts on Saturday.
The 49ers would also like at some point to get back Bubba Ventrone, a special-teams player who was also released on Saturday.