JL
Defensive coordinator · defensive preparation
Club tenure evidence: Hired as the Bills defensive coordinator on Jan. 31, 2026.
BUF official coach biography · retrieved 2026-09-07
A coordinator title alone does not establish who calls plays. Current role listing: buffalobills.com / coaches · 2026-09-20.
Scheme label
Not sourced yet · scheme label not sourced yet — a coverage task; will not invent Cover 3
MatchQuarters
- AFC East Preview: Buffalo’s New Defense vs. New England's Deep BallIn this AFC East preview, we analyze how new defensive coordinator Jim Leonhard is transitioning the Buffalo Bills toward sticky man-match coverages and versatile front structures.
- MatchQuarters / Cody Alexander · 2026