Mitchell likely to miss at least a few weeks

49ers RB Elijah Mitchell is expected to miss "a few weeks (or more)" with the knee injury he suffered in Sunday's opener vs. the Bears, per NFL Network's Ian Rapoport. Mitchell is undergoing an MRI on Monday to get a full view of the damage to the knee. We should get a more concrete timeline for his return over the next couple days, but fantasy owners need to start making replacement plans. Jeff Wilson is the favorite to take over as San Francisco's lead RB, but Jordan Mason and Ty Davis-Price are also worth stashing.