The San Francisco 49ers have somehow managed to churn out a productive, efficient offense even without running back Christian McCaffrey. Just because they've been able to churn out yards and points doesn't mean life hasn't been more difficult for the 49ers without

McCaffrey is battling Achilles tendinitis that first cropped up in Week 17 last season. There was some hope he’d return for the season opener, but he missed that game before landing on the injured list where he’s been since Week 2 with no firm timetable for his return.

The San Francisco 49ers lost another running back on Thursday night, with fill-in starter Jordan Mason exiting Week 6's victory over the Seattle Seahawks with a shoulder injury. They'll have to make do,