Sleeper: De'Zhaun Stribling, WR, San Francisco 49ers2 of 3AP PhotoRookie receivers can have trouble finding much field time under 49ers head coach Kyle Shanahan. De'Zhaun Stribling, this year's No. Stribling has size, speed and explosive athleticism, and his acceleration could make him a yards-after-catch monster in this offense. Ricky Pearsall is out for the year, and Christian Kirk is fighting a calf injury that could linger into the regular season. The injury risks tied to 30-somethings Mike Evans, George Kittle and Christian McCaffrey all speak for themselves, too.