Christian McCaffrey still undergoing tests

49ers HC Kyle Shanahan said Monday afternoon that RB Christian McCaffrey is still undergoing tests on the injury he suffered in the Week 6 loss to the Browns. Shanahan said it's still unclear whether McCaffrey has an injury to his oblique, ribs, or both -- and that figuring that out will help determine whether he's able to play against the Vikings next Monday night. We'll keep you updated on McCaffrey's status.