Day 13 of 49ers Training Camp: Jeff Wilson Jr. Returns, Injuries Impact WR Room San Francisco 49ersThe 49ers already have a wide receiver problem SFGATE49ers hope to avoid adding free-agent wide receiver as injuries pile up NBC Sports Bay Area & California49ers injury updates: Another rookie goes down with an injury that’ll force him to miss a month Niners NationThe Good and Not So Good from 49ers Camp: WR has High Ankle Sprain Sports Illustrated