Jeff
Hardeveld
LMNetherlands · SC Telstar
Player dossierEredivisie
JeffHardeveld
LMLeft MidfieldMidfield
- Club
- SC Telstar
- League
- Eredivisie
- Nationality
- Netherlands
- Age
- 31
- Height
- 184 cm
- Foot
- Left
- Valued
- 28 May 2026
Reading the valuation
The market values Hardeveld at €450k. Model A, which never saw Hardeveld during training, estimates €973k: the market value is 54% below that estimate.
That is a factor of ×2.16. 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 €1.8M, 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.
- Apps
- 39
- Minutes
- 3,429
- Goals
- 7
- Assists
- 8
- Started
- 39/39
- Min / app
- 88
- 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 Hardeveld…
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 €450k
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 1,687 midfielders
Dashed ring: the midfielder median (50th percentile)
Starts
Share of appearances started rather than entered from the bench.
100% this player69% midfielder median99th 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
- €50k
- Feb 2014
- Peak
- €500k
- Jul 2015
- Model target
- €450k
- May 2026
- Valuations
- 27
- 4 club changes
May 2026: €450k, SC Telstar. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2014-02-10 | €50k | Feyenoord/Excelsior U19 |
| 2015-02-16 | €250k | FC Utrecht |
| 2015-07-01 | €500k | FC Utrecht |
| 2015-11-11 | €400k | FC Utrecht |
| 2016-02-05 | €300k | FC Utrecht |
| 2016-07-15 | €250k | FC Utrecht |
| 2017-01-18 | €150k | FC Utrecht |
| 2017-06-07 | €300k | FC Utrecht |
| 2018-01-17 | €500k | Heracles Almelo |
| 2018-06-12 | €500k | Heracles Almelo |
| 2018-12-28 | €500k | Heracles Almelo |
| 2019-06-12 | €300k | Heracles Almelo |
| 2019-12-18 | €300k | Heracles Almelo |
| 2020-10-14 | €300k | Heracles Almelo |
| 2021-01-06 | €450k | Heracles Almelo |
| 2021-05-19 | €450k | Heracles Almelo |
| 2021-10-12 | €400k | FC Emmen |
| 2022-01-12 | €350k | FC Emmen |
| 2022-06-23 | €325k | FC Emmen |
| 2022-11-11 | €325k | FC Emmen |
| 2023-06-23 | €300k | FC Emmen |
| 2024-01-08 | €300k | FC Emmen |
| 2024-06-10 | €350k | FC Emmen |
| 2024-12-10 | €350k | SC Telstar |
| 2025-06-09 | €450k | SC Telstar |
| 2025-12-02 | €450k | SC Telstar |
| 2026-05-28 | €450k | SC Telstar |
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
- −0.771
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 22% of the 425 Eredivisie players.
See them in the Explorer →Midfielders, all leagues1,687 players · median €2M
Valued above 15% of the 1,687 midfielders.
See them in the Explorer →Where Hardeveld appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- PetersonLWFortuna Sittard · Eredivisie€450k
- BakkerCBSC Telstar · Eredivisie€450k
- MiraniCBHeracles Almelo · Eredivisie€450k
- MárquezCBFortuna Sittard · Eredivisie€450k
- MuñozCMAsteras Aktor · midfielders€450k
- BrandhofCMAC Horsens · midfielders€450k
- YablonskiyDMAsteras Aktor · midfielders€450k
- BouzoukisAMVolos NFC · midfielders€450k
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).