It's no secret the San Francisco 49ers have had all sorts of injury issues during training camp, a few of which have come at the running back position.
Ameer Abdullah (ribs) and Patrick Taylor Jr. (shoulder) have been lost to season-ending injuries. And undrafted rookie Corey Kiner was waived/injured after suffering a severe high-ankle sprain and was subsequently reverted to injured reserve once he cleared waivers.
When Christian McCaffrey, who's missed 37 of a possible 84 regular-season games over the last five years and appeared in just four contests for San Francisco a season ago, is your healthiest running back, you know things aren't going your way.