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NFL Lockdown Report: Best defenders at preventing separation in coverage

2S011RA Kansas City Chiefs cornerback Trent McDuffie comes onto the field during introductions before an NFL football game against the Houston Texans, Saturday, Dec. 21, 2024 in Kansas City, Mo. The Chiefs defeated the Texans, 27-19. (AP Photo/Reed Hoffmann)

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Estimated reading time: 3 minutes


It’s never too early to start preparing for next season, and for PFF, that means looking at ways to improve PFF Premium Stats. One way we’re looking to enhance the experience is by introducing more data into the mix.

This season, we presented a new metric we coined “Lockdown Percentage,” which identifies The NFL's best defenders at preventing separation in coverage.

Here is how the league's defenders fared after 18 weeks of action.

What is Lockdown Percentage? 

This metric focuses on coverage, measuring how well a defender prevents a receiver from getting open. It excludes plays where the defender intentionally gives up space to protect the first-down marker or limit yards after the catch.

Week 18 lockdown report (min. 7 opportunities)

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