The San Francisco 49ers aren’t afraid to roll the dice on players who have dealt with injuries recently. This offseason, the Niners brought back Dre Greenlaw, who dealt with injuries during his one season with the Denver Broncos, and signed veteran wideouts Mike Evans and Christian Kirk. Like Greenlaw, Evans dealt with injuries last season with the Tampa Bay Buccaneers, while Kirk also had injury problems in the previous campaign with the Housto…