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.

By John Kosko Oct 23, 2025 9:30 am EDT
NFL
Premium Content

Philadelphia Eagles cornerback Cooper DeJean leads the way in PFF's cornerback rankings, and he is followed by Sauce Gardner and DJ Turner.

By John Kosko Oct 23, 2025 8:40 am EDT

The Cleveland Browns lead the way in PFF's defensive line rankings ahead of Week 7, but they are closely followed by the Los Angeles Rams.

By John Kosko Oct 16, 2025 9:15 am EDT
NFL
Premium Content

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.

By John Kosko Oct 16, 2025 8:45 am EDT
NFL
Premium Content

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.

By John Kosko Oct 16, 2025 8:15 am EDT

This season, we will closely monitor NFL defensive line play throughout the season. Unlike our offensive line rankings, which in some cases consider previous-season rankings, these rankings will be based purely on 2025 play.

By John Kosko Oct 9, 2025 9:30 am EDT
NFL
Premium Content

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. 

By John Kosko Oct 9, 2025 9:19 am EDT

The Browns' unit has earned a 90.5 overall grade, led by Myles Garrett at 92.9. Maliek Collins has been dominant on the interior with a 90.2 grade — seventh-best among interior defenders — while seven Browns defenders have overall grades of 71.5 or better.

By John Kosko Oct 2, 2025 9:30 am EDT
NFL
Premium Content

Jacksonville Jaguars cornerback Jourdan Lewis remains atop the 2025 NFL cornerback rankings through Week 4.

By John Kosko Oct 2, 2025 8:40 am EDT

A fixture near the top of last year’s rankings, the Cleveland Browns’ defensive line reclaims the No. 1 spot, powered by the dominant duo of Myles Garrett and Maliek Collins.

By John Kosko Sep 25, 2025 11:02 am EDT
NFL
Premium Content

The top 32 cornerbacks in PFF’s advanced coverage grade after Week 3 of the 2025 season, headlined by Jacksonville's Jourdan Lewis.

By John Kosko Sep 25, 2025 9:55 am EDT

A staple atop the rankings last season, the Cleveland Browns defensive line reclaims the No. 1 spot, led by the dominant tandem of Myles Garrett and Maliek Collins.

By John Kosko Sep 18, 2025 10:11 am EDT

New York Jets star Sauce Gardner is back on top in PFF coverage grade.

By John Kosko Sep 18, 2025 9:25 am EDT
NFL
Premium Content

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.

By John Kosko Sep 18, 2025 8:45 am EDT

Seattle's Josh Jobe and Arizona's Will Johnson headline the Week 1 cornerback rankings.

By John Kosko Sep 11, 2025 9:44 am EDT

The Washington Commanders assume the No. 1 spot on PFF's defensive line rankings after Week 1 of the 2025 NFL season.

By John Kosko Sep 11, 2025 7:15 am EDT

Every quarterback has a weakness. Here is one to watch for every 2025 NFL starter ahead of the regular season.

By John Kosko Aug 28, 2025 10:00 am EDT

There was a lot to glean from one of the most anticipated NFL debuts of the 2025 preseason.

By John Kosko Aug 12, 2025 10:00 am EDT Cleveland Browns

Myles Garrett and Milton Williams were among the NFL's pass-rushing savants on various moves last season.

By John Kosko Jul 31, 2025 9:30 am EDT

PFF's advanced coverage grade metric goes deeper into how defenders prevent separation and handle difficult matchups.

By John Kosko Jul 24, 2025 9:05 am EDT
Bio

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.