The 49ers placed Hasty (collarbone) on injured reserve Tuesday.
Now that he's on IR, Hasty will need to remain there for three weeks before the team can open a 21-day window to return him to the active roster. With the 49ers on bye Week 11, he'll potentially only miss two games as a result, with his earliest possible next appearance lining up to be Sunday, Dec. 13 against Washington. Currently, San Francisco has one fully healthy RB in Austin Walter, two injured backs -- Tevin Coleman (knee) and Jerick McKinnon (neck) -- on the active roster, and three backfield options -- Raheem Mostert (ankle), Jeff Wilson (ankle) and Hasty -- on IR.