FairValue

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Jozhua

Vertrouwd

CBNetherlands · Rayo Vallecano

№ 765467Established €2.9M −0.37

Player dossierLaLiga

JozhuaVertrouwd

CBCentre-BackDefender

Club
Rayo Vallecano
League
LaLiga
Nationality
Netherlands
Age
21
Height
187 cm
Foot
Left
Valued
5 Jun 2026

Reading the valuation

The market values Vertrouwd at €2M. Model A, which never saw Vertrouwd during training, estimates €2.9M: the market value is 31% below that estimate.

That is a factor of ×1.44. Model A's typical held-out miss is ×1.50 either way, so this gap is within its usual error.

Without league and club, Model B estimates €1.4M, 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.

▼ −0.37A €2.9M▲ +0.34B €1.4M
Pitch length is a log value scale fitted to this player's figures. ● observed · ◇ Model A · dashed ◇ Model B · each arc is a residual, log(observed) − log(estimate).
Apps
14
Minutes
859
Goals
0
Assists
0
Started
8/14
Min / app
61
Cards
0Y 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 Vertrouwd…

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 €2M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €2MModel A €2.9M

Asking 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

Jozhua Vertrouwd's percentiles among defenders: Goals per 90 18th, Assists per 90 17th, Minutes, two years 9th, Starts 12th, Minutes, last 365 days 24th, European club minutes 85th18thGoals17thAssists9thMinutes12thStarts24thRecent85thEurope

Dashed ring: the defender median (50th percentile)

European club minutes

Share of minutes played in UEFA club competitions.

21% this player0% defender median85th percentile

0%peer deciles · median line · this player ●85%

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
€25k
Mar 2022
Peak
€3M
Dec 2025
Model target
€2M
Jun 2026
Valuations
15
3 club changes
Jun 2026€2MRayo VallecanoValuation the model is trained to reproduce

Jun 2026: €2M, Rayo Vallecano. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2022-03-24€25kFC Volendam U21
2022-06-23€50kFC Volendam U21
2022-10-12€75kFC Utrecht U21
2023-07-04€125kFC Utrecht U21
2023-10-13€150kCD Castellón
2023-12-20€150kCD Castellón
2024-06-24€150kCD Castellón
2024-10-14€300kCD Castellón
2024-12-13€300kCD Castellón
2025-03-27€600kCD Castellón
2025-06-24€1MCD Castellón
2025-10-02€1.5MRayo Vallecano
2025-12-12€3MRayo Vallecano
2026-03-16€2.5MRayo Vallecano
2026-06-05€2MRayo Vallecano

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
−0.367

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 →

LaLiga509 players · median €4M

Valued above 28% of the 509 LaLiga players.

€100k€1M€10M€100M€2MSee them in the Explorer →

Defenders, all leagues2,065 players · median €2M

Valued above 49% of the 2,065 defenders.

€20k€200k€2M€20M€2MSee them in the Explorer →

Where Vertrouwd appears

Watchlists and the comparison tray are kept in this browser only.

Near this valuation closest observed values: same league, then same position

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).