But who's throwing the most accurate deep throws? Pro Football Focus also tracks receiver drops, so instead of completion percentage—which knocks the QB for throws that should have been caught—we can use PFF's "accuracy" figure, which is a measurement of how many throws were on target (completions + drops over attempts):
Accuracy isn't a perfectly fair measure though; a 25-yard first down is great, but it's not as good as a 50-yard touchdown, even if that throw is harder to hit. Here's a chart of yards per attempt by QB on 20+ yard targets, still from 2008 through present:
[
from deadspin]