Defensive Coordinator, Ohio State · FBS · since 2025
2 seasons in the seatHead coach highest tier reachedRyan Day mentor2 other mentors15 protégés
Drawing the tree…
| Coach | Where | Seasons |
|---|---|---|
| Ryan Day | Ohio State | 2025–2026 |
| Bill Belichick | New England Patriots | 2022 |
| Bill Belichick | New England Patriots | 2004–2017 |
| Paul Pasqualoni | Syracuse | 2001–2003 |
| Coach | Where | Seasons |
|---|
| Coach | Where | Seasons |
|---|
| Cory Undlin | Detroit Lions | 2020 |
| John Bonamego | Detroit Lions | 2019 |
| Sean Ryan | Detroit Lions | 2019–2020 |
| Ty Warren | Detroit Lions | 2019–2020 |
| Billy Yates | Detroit Lions | 2018–2020 |
| Bo Davis | Detroit Lions | 2018–2020 |
| Brian Stewart | Detroit Lions | 2018–2019 |
| Chris White | Detroit Lions | 2018–2019 |
| David Walker | Detroit Lions | 2018 |
| Evan Rothstein | Detroit Lions | 2018–2020 |
| George Godsey | Detroit Lions | 2018 |
| Hank Fraley | Detroit Lions | 2018–2020 |
| Paul Pasqualoni | Detroit Lions | 2018–2019 |
| Robert Prince | Detroit Lions | 2018–2020 |
| Steve Gregory | Detroit Lions | 2018–2020 |
| Coach | Where | Seasons |
|---|
| Jim Knowles | Ohio State | 2025 |
| Jim Caldwell | Detroit Lions | 2018 |
| Dean Pees | New England Patriots | 2006 |
| Coach | Where | Seasons |
|---|
| Adrian Klemm | New England Patriots | 2023 |
| Robert Prince | Detroit Lions | 2020 |
| Bill Belichick | New England Patriots | 2021 |