FairValue

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  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
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Luc

Marijnissen

CBNetherlands · FCV Dender EH

№ 717604Emerging €2.1M −0.32

Player dossierPro League

LucMarijnissen

CBCentre-BackDefender

Club
FCV Dender EH
League
Pro League
Nationality
Netherlands
Age
23
Height
190 cm
Foot
Right
Valued
4 Jun 2026

Reading the valuation

The market values Marijnissen at €1.5M. Model A, which never saw Marijnissen during training, estimates €2.1M: the market value is 27% below that estimate.

That is a factor of ×1.37. 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 €2.6M, further from the market. Model B is usually further off (typical miss ×2.07): league and club explain much of how the market prices players.

A gap describes the model's arithmetic for this player's inputs, not what the player is worth.

▼ −0.32A €2.1M▼ −0.56B €2.6M
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
35
Minutes
3,060
Goals
1
Assists
0
Started
35/35
Min / app
87
Cards
6Y 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 Marijnissen…

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 €1.5M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €1.5MModel A €2.1M

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

Luc Marijnissen's percentiles among defenders: Goals per 90 48th, Assists per 90 17th, Minutes, two years 54th, Starts 97th, Minutes, last 365 days 90th, European club minutes 30th48thGoals17thAssists54thMinutes97thStarts90thRecent30thEurope

Dashed ring: the defender median (50th percentile)

Starts

Share of appearances started rather than entered from the bench.

100% this player83% defender median97th percentile

18%peer deciles · median line · this player ●100%

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
Oct 2021
Peak
€1.5M
Jun 2026
Model target
€1.5M
Jun 2026
Valuations
12
3 club changes
Jun 2026€1.5MFCV Dender EHValuation the model is trained to reproduce

Jun 2026: €1.5M, FCV Dender EH. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2021-10-12€25kNAC Breda U21
2022-01-12€25kNAC Breda U21
2022-06-23€25kNAC Breda U21
2023-07-04€50kNAC Breda U21
2023-10-02€250kKSK Lierse Kempenzonen
2023-12-28€300kKSK Lierse Kempenzonen
2024-06-20€300kKSK Lierse Kempenzonen
2024-12-20€400kK Lierse SK
2025-04-24€500kK Lierse SK
2025-10-01€800kFCV Dender EH
2025-12-10€1.2MFCV Dender EH
2026-06-04€1.5MFCV Dender EH

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
−0.317

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 →

Pro League350 players · median €1.8M

Valued above 39% of the 350 Pro League players.

€100k€750k€5M€30M€1.5MSee them in the Explorer →

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

Valued above 43% of the 2,065 defenders.

€20k€200k€2M€20M€1.5MSee them in the Explorer →

Where Marijnissen 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).