The list continues to grow as Niners players drop out of training camp practices with little nicks, dings and bruises. Brown (1) works with a member of the coaching staff during training camp at Gillette Stadium on July 28. (Thearon W. Henderson, Getty Images) San Francisco 49ers running back Christian McCaffrey works out during training camp practice at SAP Performance Facility in Santa Clara, California, on July 27. See NFL players in action at training camp San Francisco 49ers running back Christian McCaffrey works out during training camp practice at SAP Performance Facility in Santa Clara, California, on July 27. This article originally appeared on USA TODAY Sports: San Francisco 49ers injury tracker: Who's in, who's out for Niners?