Cal football position breakdown: In the buildup to Cal’s Sept. 5 season opener against Grambling State, The Quarterback Jared Goff is widely considered a potential first-round pick in the 2016 NFL Draft. [...] to march deep into Cal’s record books, he needed an elite crop of receivers. Junior Kenny Lawler, who tallied a team-best 54 catches in 2014, leads the Bears’ receiving corps. Cal ranked sixth nationally last season with 346 passing yards per game. [...] though Chris Harper (634 receiving yards in 2014) is with the New England Patriots, the Bears are well positioned to build on that number. Having six top-flight upperclassman receivers would seemingly leave few available catches for complementary pieces. [...] head coach Sonny Dykes is intent on speeding up the offensive tempo, and that means utilizing his immense depth at receiver. Kanawai Noa, Raymond Hudson, Matt Rockett, Jack Austin and Chad Hansen all impressed coaches enough in preseason to warrant a shot at the rotation.