The Zeitgeist List · Coordinators · Never a head coach
Glenn Spencer.
Defensive coordinator · 8 seasons · 4 stints · 4 programs0 seasons ranked in the national top 10%
Own effect on the unit
Defense−0.02not distinguishable from zero
model fit as of 2026-09-04
The tenure clock
Every stop re-aligned to its own first year, so the stops stack instead of scrolling past each other. The gray dashed line is a reference, not a path: each point is the median of whoever was still in the job that year, across every real OC/DC stint since 2014 at that role, and the pool shrinks year over year because surviving to a later year means not having been fired.
Oklahoma State 2014–2017
Charlotte 2018–2018
Florida Atlantic 2019–2019
South Florida 2020–2021
Median of those still in the job, that year of a tenure. A shrinking pool, not a path.
Oklahoma State, 4 years
▲ 21.1
26.2 to 47.3 percentile.
South Florida, 2 years
▼ 20.7
31.9 to 11.2 percentile.
Median defensive coordinator
+0.5
first season to last, across 235 stints of 3+ years. 50.6% improve at all.
Every stop on the calendar
| Years | Program | Walked into | Year 1 | Best | Vs. talent |
|---|---|---|---|---|---|
| 2014–2017 | Oklahoma State | 93.2 | 26.2 | 47.3 | ▼ 17.0 |
| 2018–2018 | Charlotte | 22.7 | 66.5 | 66.5 | ▲ 31.9 |
| 2019–2019 | Florida Atlantic | 65.0 | 81.2 | 81.2 | ▲ 32.9 |
| 2020–2021 | South Florida | 52.7 | 31.9 | 31.9 | ▼ 27.2 |
Oklahoma State 2014–2017: ranked 93rd the year before he arrived, 47th at its best — went backwards.
South Florida 2020–2021: ranked 53rd the year before he arrived, 32nd at its best — went backwards.