Age
44
Oct 27, 1982
DEN · 2024–25→BUF · 2026–presentActive
JimLeonhardDCDefensive Coordinator
ジム・レオンハード
Defensive Coordinator
Buffalo Bills · since 2026With BUF
2026
first season
Coaching
10 yrs
since 2016
NFL
2 yrs
since 2024
NFL teams
2
DEN · BUF
2026 Season so farここまでの成績
BUF · Defenseディフェンス · through Week 9第9週終了時点Team recordチーム成績
7-1
Buffalo Bills
EPA/play allowedEPA/プレー（被）
−0.010
13th13位
Success rate allowed成功率（被）
44.3%
21st21位
Points allowed/game失点/試合
23.4
16th16位
Partial season. Ranks are among 32 teams (1st is best; for defense, lower is better). Regular season only. Unit he is responsible for by title; play-calling is not implied. Source: nflverse play-by-play.シーズン途中の値です。順位は32チーム中（1位が最良、守備は値が小さいほど良い）。レギュラーシーズンのみ。役職上の担当ユニットの成績で、プレーコール担当とは限りません。出典: nflverse プレーバイプレー。
Career
College からのコーチ遍歴。各ステップで師事したヘッドコーチも掲載。
01 / Career
Biography
WikipediaJames Andrew Leonhard (born October 27, 1982) is an American professional football coach and former player who is the defensive coordinator for the Buffalo Bills of the National Football League (NFL). He played professionally in the NFL as a safety for 10 seasons. Leonhard played college football for the Wisconsin Badgers and was signed by the Buffalo Bills as an undrafted free agent. He also played in the NFL for the Baltimore Ravens, New York Jets, Broncos, New Orleans Saints and Cleveland Browns.
Career Path
2016 — Present · Mentors noted2026–
Buffalo Bills · Defensive coordinator
NFL
2024–2025
Denver Broncos · Defensive backs coach & pass game coordinator → Assistant head coach & pass game coordinator
Defensive backs coach & pass game coordinator (2024) · Assistant head coach & pass game coordinator (2025)
NFL
2023
Illinois · Senior football analyst
NCAA
2016–2022
Wisconsin · Defensive backs coach → Defensive coordinator & defensive backs coach → Interim head coach
Defensive backs coach (2016) · Defensive coordinator & defensive backs coach (2017-2022) · Interim head coach (2022)
NCAA
Current Role
BUF · since 2026Defensive Coordinator
Buffalo Bills
first season in the role · hired 2026
Coaching since2016
In the NFL since2024
NFL teamsDEN · BUF
Unit Performance by Season
2026–2026 · nflverse| Season年 | Team / roleチーム・役職 | Record戦績 | Unit metrics (league rank)担当ユニットの指標（リーグ順位） |
|---|---|---|---|
| 2026 thru Wk 9第9週まで | BUF DCDC | 7-1 | EPA/play allowedEPA/プレー（被）−0.01013th13位Success rate allowed成功率（被）44.3%21st21位Points allowed/game失点/試合23.416th16位 |
Unit he was responsible for by title; play-calling duties are not implied. Source: nflverse play-by-play (1999–), regular season. Seasons before 1999 are not shown.役職上の担当ユニットの成績です。プレーコール担当とは限りません。出典: nflverse のプレーバイプレー（1999年〜）、レギュラーシーズン。1999年より前のシーズンは掲載していません。
Head coaches he worked under
Derived from game data試合データから導出- DEN 2024–2025
- BUF 2026
The head coach of his team in each NFL season he coached (1999–). Earlier seasons and hand-curated lineage are not included.NFLの各シーズンで所属チームのヘッドコーチだった人物です（1999年〜）。1999年より前と、手作業でまとめた系譜は含みません。
Playing career
Before coaching · FS2014
Cleveland Browns · FS
NFL
2013
Buffalo Bills · FS
NFL
2013
New Orleans Saints · FS
NFL
2012
Denver Broncos · FS
NFL
2009–2011
New York Jets · FS
NFL
2008
Baltimore Ravens · FS
NFL
2005–2007
Buffalo Bills · FS
NFL
Data Sources & Attribution
CreditsHeadshot — Wikimedia CommonsJeffrey Beall. Licensed under CC BY-SA 3.0 via Wikimedia Commons. Source file
Records & history — Pro Football ReferenceSports Reference LLC. “Pro Football Statistics and History.” Pro-Football-Reference.com. (Accessed 2026-08-31.)
Biography — WikipediaCareer timeline and biographical details from Wikipedia, CC BY-SA.
Draft profileThis page was compiled automatically from the coach’s Wikipedia article and is pending editorial review. Career dates and roles follow the article as of 2026-08-31.