Report: 49ers RB Elijah Mitchell (knee) out at least a few weeks

San Francisco 49ers running back Elijah Mitchell will miss some time with a right knee injury he sustained during the team's Week 1 loss to the host Chicago Bears on Sunday.

NFL Network reported Monday that Mitchell was expected to be sidelined a few weeks or more, depending on the result of an MRI.

Mitchell left Sunday's 19-10 loss after being tackled by Bears safety Eddie Jackson, whose shoulder collided with Mitchell