ESPN did an exercise where they went through each team and ranked the quarterbacks left in the playoffs. Seth Walder, the author who wrote the article, said he relied on a variety of advanced metrics and considered each QB in a vacuum. Some of the stats he cited were Total QBR, EPA, completion percentage over expectation, and ESPN’s predictive QB EPA rating — with a dash of his own judgment.
I try and stay away from quarterback stats for numerous reasons. First, stats don’t tell the whole story. We know that. It’s exaggerated when it comes to quarterbacks.