John Kosko
NFL Contributor • View all analysts
Recent Articles
Will Anderson Jr. and Danielle Hunter have formed a dominant duo, earning 91.5 and 90.3 grades, respectively. Anderson’s 29.0% pass-rush win rate leads both the team and the NFL, while Hunter isn’t far behind at 24.1% and leads the Texans with four quarterback hits. Seven Houston defenders have earned pass-rush grades of 72.1 or better, and all four players with at least 100 pass-rush snaps have recorded 10 or more pressures.
Thu, 23 Oct 25 13:30:00 +0000
Cooper DeJean tops the list for the first time in his career following a standout Week 6 performance against the New York Giants. He allowed zero catches in coverage and continues to post elite metrics, giving up just 0.56 yards per cover snap and a first down or touchdown on only 24% of his targets.
Thu, 16 Oct 25 12:45:00 +0000
Advanced coverage grade uses machine learning to map the separation allowed on a play to the expected PFF coverage grade the player would have earned had they been targeted. This system also takes into account the difficulty of the assignment and the situation when making that assessment.
Thu, 16 Oct 25 12:15:00 +0000
Each week, after every NFL game is graded and reviewed, PFF will check in on the top cornerbacks of the 2025 season. These rankings will change drastically over the first month, as one interception, one missed tackle, or one deep completion can significantly alter a player's grade when the sample size is small. But as snap counts rise, the grades will stabilize and we'll get a clearer picture of the league's best cornerbacks.
Thu, 09 Oct 25 13:19:20 +0000
Advanced coverage grade uses machine learning to map the separation allowed on a play to the expected PFF coverage grade the player would have earned had they been targeted. This system also takes into account the difficulty of the assignment and the situation when making that assessment.
Thu, 18 Sep 25 12:45:00 +0000Bio
John joined PFF in July 2014, and serves as an NFL Analyst. John is also a former Kansas Football safety. He obtained a Bachelor’s degree in Liberal Arts and Sciences Studies.