Tim
Oermann
CBGermany · Bayer 04 Leverkusen
Player dossierBundesliga
TimOermann
CBCentre-BackDefender
- Club
- Bayer 04 Leverkusen
- League
- Bundesliga
- Nationality
- Germany
- Age
- 22
- Height
- 189 cm
- Foot
- Right
- Valued
- 27 May 2026
Reading the valuation
The market values Oermann at €4M. Model A, which never saw Oermann during training, estimates €7.1M: the market value is 44% below that estimate.
That is a factor of ×1.78. Model A's typical held-out miss is ×1.50 either way, so this gap is larger than its usual error.
Without league and club, Model B estimates €5.6M, closer to the market here, although it is usually further off (typical miss ×2.07).
A gap describes the model's arithmetic for this player's inputs, not what the player is worth.
- Apps
- 39
- Minutes
- 2,735
- Goals
- 1
- Assists
- 2
- Started
- 32/39
- Min / app
- 70
- Cards
- 2Y 0R
Club matches, two years to the valuation date
The Valuation Journey
What moves Model A
Asking the prediction API to explain Model A for Oermann…
SHAP describes the model's arithmetic for this player's inputs, not what causes market value. Model B can be explained only by the live service; Model A also has a published explanation for the research players.
Model A vs Model B against the observed €4M
Checking APIAsking the prediction API…
Held-out estimates come from cross-validation, with this player outside the training data: the honest comparison. Served models were refitted on every player, this one included, so they sit closer to the market. Shaded band: Model A's typical miss (×1.50 either way).
Player traitspercentiles vs 2,065 defenders
Dashed ring: the defender median (50th percentile)
European club minutes
Share of minutes played in UEFA club competitions.
18% this player0% defender median82nd percentile
No passing, progression or defensive actions exist in the dataset, so no trait claims to measure them.
Valuation history every Transfermarkt valuation on record
- First valuation
- €200k
- Jul 2022
- Peak
- €5M
- Mar 2025
- Model target
- €4M
- May 2026
- Valuations
- 11
- 4 club changes
May 2026: €4M, Bayer 04 Leverkusen. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2022-07-05 | €200k | VfL Bochum |
| 2022-11-09 | €600k | VfL Bochum |
| 2023-06-12 | €800k | Wolfsberger AC |
| 2023-12-14 | €800k | VfL Bochum |
| 2024-03-27 | €4M | VfL Bochum |
| 2024-05-29 | €4M | VfL Bochum |
| 2024-12-20 | €4M | VfL Bochum |
| 2025-03-27 | €5M | VfL Bochum |
| 2025-06-05 | €5M | VfL Bochum |
| 2025-12-22 | €4M | SK Sturm Graz |
| 2026-05-27 | €4M | Bayer 04 Leverkusen |
Audit context group-level, not about this player
- Audit group
- UEFA
- Population gap, Model A
- +0.093 95% CI +0.063 to +0.124
- This player, market vs held-out A
- −0.575
The group comes from first-listed citizenship and is never a model input. Across the population, non-UEFA players' market values sit about 10% above Model A's held-out estimates, relative to UEFA players in the same leagues. One player's residual says nothing about that pattern (typical miss ×1.50), and none of it is evidence of discrimination: the target may itself be biased. Open the Fairness Audit
In context observed value among comparable players in this build
All players in the Terminal →Bundesliga451 players · median €5M
Valued above 39% of the 451 Bundesliga players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 65% of the 2,065 defenders.
See them in the Explorer →Where Oermann appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- NeuerGKBayern Munich · Bundesliga€4M
- SüleCBBorussia Dortmund · Bundesliga€4M
- GrifoLWSC Freiburg · Bundesliga€4M
- ZettererGKEintracht Frankfurt · Bundesliga€4M
- KolasinacCBAtalanta BC · defenders€4M
- TagliaficoLBOlympique Lyon · defenders€4M
- BurnCBNewcastle United · defenders€4M
- SchärCBNewcastle United · defenders€4M
Counts and ranks of observed Transfermarkt values only; model errors are never ranked here. Full player export: Every player in the modelling population (D-011).