Jack Koerner: DB · Iowa · #28.
Closest statistical matches, adjusted for opponent strength.
Jack Koerner
Plays like an extra linebacker near the line. Fourth year in the same secondary at Iowa. First career honor, 2020: All-Big Ten. One game to point at: 11 tackles against Wisconsin — Week 9, 2021.
Play style
Lives near the line of scrimmage as a de facto extra linebacker.
Activity vs finishing · season enumeration
What the box score actually says
83 tackles. 2 passes defended. 2 interceptions. 3 TFL.
Counts only, never a rate — splash-event sample sizes this small (interceptions, pass breakups, TFL) are noise as a rate and signal only as a tally.
No outlet on our list has written about this player by name this season.
KCCI Oct 28
FOX 9 Minneapolis-St. Paul Oct 27Swipe the table sideways for more columns.
Game log · Week-by-week
2021 season · 12 games
Swipe the table sideways for more columns.
| Wk | Opp | TKL | SOLO | TFL | SACK | INT | PD | Note |
|---|---|---|---|---|---|---|---|---|
| Wk 1 | W 34-6vs No. 17 Indiana | 5 | 3 | 0.0 | 0.0 | — | 2 | |
| Wk 2 | W 27-17@ No. 9 Iowa State | 5 | 5 | 0.0 | 0.0 | — | 0 | |
| Wk 3 | W 30-7vs Kent State | 7 | 5 | 1.0 | 0.0 | — | 0 | |
| Wk 4 | W 24-14vs Colorado State | 6 | 6 | 0.0 | 0.0 | — | 0 | |
| Wk 5 | W 51-14@ Maryland | 2 | 2 | 0.0 | 0.0 | 1 | 0 | |
| Wk 6 | W 23-20vs No. 4 Penn State | 7 | 4 | 0.0 | 0.0 | 1 | 0 | |
| Wk 7 | L 7-24vs Purdue | 9 | 5 | 2.0 | 0.0 | — | 0 | |
| Wk 9 | L 7-27@ Wisconsin | 11 | 9 | 0.0 | 0.0 | — | 0 | Season-high 11 tackles |
| Wk 10 | W 17-12@ Northwestern | 8 | 8 | 0.0 | 0.0 | — | 0 | |
| Wk 11 | W 27-22vs Minnesota | 8 | 3 | 0.0 | 0.0 | — | 0 | |
| Wk 13 | W 28-21@ Nebraska | 7 | 6 | 0.0 | 0.0 | — | 0 | |
| Wk 14 | L 3-42vs No. 2 Michigan | 8 | 5 | 0.0 | 0.0 | — | 0 | |
| Total | 83 | 61 | 3.0 | 0.0 | 2 | 2 |
Week 6 · 2021
W 23-20
vs Penn State
1 interception · 7 tackles · 4 solo tackles
A close one, won by 3 at home.
Where his impact shows up on the stat sheet
PD rate
3%3 pass breakupsInterceptions
2interceptionsTackle volume
88tackles this seasonTFL rate
4%4 TFL88 tackles · 3.5 for loss · 3 pass breakups · 2 interceptions.
4 seasons under Kirk Ferentz — 35-13 over that span.
Splits · Per-game
2021 season · 12 games
Home vs Road
| TKL/g | TFL/g | SACK/g | PD/g | |
|---|---|---|---|---|
| Home6g | 7.0 | 0.5 | 0.0 | 0.3 |
| Road5g | 6.6 | 0.0 | 0.0 | 0.0 |
First half vs Second half
| TKL/g | TFL/g | SACK/g | PD/g | |
|---|---|---|---|---|
| Weeks 1-77g | 5.9 | 0.4 | 0.0 | 0.3 |
| Weeks 8+5g | 8.4 | 0.0 | 0.0 | 0.0 |
Supporting cast · Scheme
Staff and system around the player
Head Coach
Kirk Ferentz
Pass share
45.0%
404 pass / 494 run
Plays / game
69.1
13 games
Team sack rate
7.1%
434 dropbacks · PBP
Scheme: Run-leaning.
Player standing · 2021
88 tackles in 12 games, more tackles a game than nearly every FBS defensive back who plays every week.
Recognition
Production · CFB Zeitgeist Score
How it ended
Four seasons at Iowa, 215 tackles — the college career is complete.
Four or fewer games in the first season, then ten or more.
Coaching lineage · 2018–2021
1 coachPlayed every college season under Kirk Ferentz.
