What happened: Hezekiah Masses and Trent McDuffie are tied at 0.0 passer rating allowed among corners with at least 30 coverage snaps. James Pierre at 12.0, Kristian Fulton at 22.6 and Malik Muhammad at 27.5 complete the top five.
Why it matters: Sub-30 ratings allowed compress downfield windows and force offenses to work underneath. Holding that range beyond September separates every-down coverage starters from matchup-dependent depth.
By the numbers: 0.0 — Hezekiah Masses; 0.0 — Trent McDuffie; 12.0 — James Pierre; 22.6 — Kristian Fulton; 27.5 — Malik Muhammad (min. 30 coverage snaps).
What to watch: Watch whether Masses and McDuffie hold perfect marks as target volume grows.