Thomas
Beelen
CBNetherlands · Feyenoord Rotterdam
Player dossierEredivisie
ThomasBeelen
CBCentre-BackDefender
- Club
- Feyenoord Rotterdam
- League
- Eredivisie
- Nationality
- Netherlands
- Age
- 24
- Height
- 190 cm
- Foot
- Right
- Valued
- 28 May 2026
Reading the valuation
The market values Beelen at €5M. Model A, which never saw Beelen during training, estimates €2.1M: the market value is 144% above that estimate.
That is a factor of ×2.44. 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 €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
- 41
- Minutes
- 2,882
- Goals
- 1
- Assists
- 1
- Started
- 30/41
- Min / app
- 70
- Cards
- 1Y 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 Beelen…
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 €5M
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.
29% this player0% defender median94th 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
- Oct 2022
- Peak
- €12M
- May 2024
- Model target
- €5M
- May 2026
- Valuations
- 11
- 1 club change
May 2026: €5M, Feyenoord Rotterdam. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2022-10-12 | €200k | PEC Zwolle |
| 2023-04-03 | €450k | PEC Zwolle |
| 2023-07-04 | €2M | PEC Zwolle |
| 2023-10-17 | €3M | Feyenoord Rotterdam |
| 2023-12-15 | €3M | Feyenoord Rotterdam |
| 2024-03-18 | €7M | Feyenoord Rotterdam |
| 2024-05-31 | €12M | Feyenoord Rotterdam |
| 2024-12-17 | €9M | Feyenoord Rotterdam |
| 2025-05-28 | €8M | Feyenoord Rotterdam |
| 2025-12-02 | €7M | Feyenoord Rotterdam |
| 2026-05-28 | €5M | Feyenoord Rotterdam |
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
- +0.890
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 →Eredivisie425 players · median €1M
Valued above 80% of the 425 Eredivisie players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 70% of the 2,065 defenders.
See them in the Explorer →Where Beelen appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- WellenreutherGKFeyenoord Rotterdam · Eredivisie€5M
- RosaRBAjax Amsterdam · Eredivisie€5M
- JarosGKAjax Amsterdam · Eredivisie€5M
- RegeerDMAjax Amsterdam · Eredivisie€5M
- OrbánCBRB Leipzig · defenders€5M
- GinterCBSC Freiburg · defenders€5M
- GuerreiroLBBayern Munich · defenders€5M
- TarkowskiCBEverton FC · defenders€5M
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).