What happened: Davison Igbinosun has three man-coverage breakups through Oct. 21 to top the rookie table. The second-round pick out of Ohio State holds a one-breakup lead, with 13 rookies tied at one.

Why it matters: Stick coverage has kept the rookie in Buffalo's corner rotation during a 5-1 start. Early breakup production offers the first tangible separator among Day 2 defensive backs.

What to watch: Buffalo's upcoming passing matchups show whether the rookie keeps the man-coverage lead.