Niners placing Christian McCaffrey (calf/Achilles) on injured reserve; RB to miss at least four games NFL.com49ers’ McCaffrey out Sun.; IR under consideration ESPNNFL Issues Statement After Investigating 49ers for Christian McCaffrey Injury Fiasco Sports Illustrated49ers place Christian McCaffrey on injured reserve NBC SportsChristian McCaffrey reportedly placed on injured reserve, will miss at least 4 games Yahoo Sports