Completion percentage can be affected by many things, but if you dive a little deeper and look specifically at his ball placement, things get even worse. Hackenberg completed 192 passes this past season, but when we charted ball location for quarterbacks in this draft class, 55 of those catches were badly located passes. He was only accurate on 48.1 percent of attempts when throwing to open receivers. By comparison, Cody Kessler was accurate on 73.2 percent of his attempts to open receivers, Carson Wentz was at 61.2 percent. Even Cardale Jones, our inaccuracy comp in this exercise, was 5 percent better when throwing to open guys.
PFF’s play-by-play grading scale works from minus-2 to plus-2 in 0.5 increments. Minus-1.5 and minus-2 throws are catastrophic plays that usually result in a turnover. Hackenberg has 37 of them over his college career, equivalent to a catastrophically bad pass on 3.1 percent of his attempts. Jared Goff, by contrast, threw one on 1.1 percent in 2015. Even Michigan State QB Connor Cook, whom we have noted throughout his draft evaluation for his bad habit of reckless throws, threw one on 1.5 percent — or less than half the rate of Hackenberg.
Don’t get me wrong: Hackenberg’s line was not good at Penn State, but it wasn’t the prohibitive collection of uniformed turnstyles that they’ve been made out to be, either. As a unit they surrendered 135 total pressures in 2015, which is bad, but 15 other teams managed worse, including Goff’s California Bears (154). 45 other offensive lines surrendered pressure at a greater rate than Hackenberg’s line last season. And in 2014, we charged Hackenberg with eight of the sacks he took, which is five more than any single lineman gave up.
In fact, since he has been the quarterback, Hackenberg has been directly to blame for more sacks than any single lineman blocking for him, and that doesn’t even touch the ones he was indirectly at fault for by being unable to effectively diagnose the pressure looks he was presented with.
Why Christian Hackenberg doesn't have a draftable grade
