Fantasy managers with stock in 49ers running back Raheem Mostert are all too familiar with his spotty injury history. The latest addition to that is chipped cartilage in his knee. Coach Kyle Shanahan said the expectation is for Mostert, now placed on injured reserve, to miss eight weeks.
Mostert left San Francisco’s win over the Lions on Sunday after taking two carries for 20 yards. He did not return. What preceded that injury and followed it make the running back situation for the 49ers — stop me if you’ve heard this before — complicated. Prior to the game, rookie Trey Sermon was announced a surprise inactive.