Dorsey (biceps) is expected to miss three and a half months after undergoing successful surgery on August 4, Matt Maiocco of CSN Bay Area reports. The three and a half month timetable is on the short end of the expected recovery from an injury like the one Dorsey sustained, so this is good news for the nose tackle and for the 49ers. Coach Jim Harbaugh is hoping that Dorsey will be ready by late-November to early-December to help out the team down the stretch. He is the leading candidate to be placed in the injured reserve - with a designation to return list. Dorsey recently signed a two-year extension with the 49ers.