Christian Hackenberg shows promise in preseason opener, but still has ways to go Christian Hackenberg shows promise in preseason opener, but still has ways to go New York Daily News 5 Takeaways from Jets’ 7-3 Win over Titans newyorkjets.com Christian Hackenberg shows definite signs of progress in Jets’ preseason opener NorthJersey.com Marcus Mariota active in much-anticipated return; Titans’ offense struggles ESPN (blog) Full coverage 13 AGO 0