The depth in the San Francisco 49ers receiving corps was tested almost immediately when starting wide receiver Ricky Pearsall went down with an injury that required season-ending surgery and veteran WR Christian Kirk was sidelined by a calf issue. After Pearsall and Kirk went out the 49ers saw veteran Mike Evans and rookie De'Zhaun Stribling also miss time with quad and hamstring issues, respectively. The result has been the emergence of veteran WR Demarcus Robinson, who stood out in the team's joint practice with the Tennessee Titans. Last season he proved capable of taking on a bigger workload in the passing game, and this year's training camp is more evidence that the 49ers WR depth should be in good shape come Week 1. AdvertisementAdvertisement AdvertisementMore 49ers: Kyle Shanahan weighs in on crucial 49ers offensive position battleThis article originally appeared on Niners Wire: Veteran WR an unlikely star of training camp for 49ers