James
Tarkowski
CBEngland · Everton FC
Image: FootyLogos
Player dossierPremier League
JamesTarkowski
CBCentre-BackDefender
- Club
- Everton FC
- League
- Premier League
- Nationality
- England
- Age
- 33
- Height
- 185 cm
- Foot
- Right
- Valued
- 3 Jun 2026
Reading the valuation
The market values Tarkowski at €5M. Model A, which never saw Tarkowski during training, estimates €5.5M: the market value is 9% below that estimate.
That is a factor of ×1.10. 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 €2.4M, 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
- 74
- Minutes
- 6,644
- Goals
- 3
- Assists
- 4
- Started
- 74/74
- Min / app
- 90
- Cards
- 14Y 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 Tarkowski…
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)
Starts
Share of appearances started rather than entered from the bench.
100% this player83% defender median97th 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 2011
- Peak
- €28M
- Oct 2020
- Model target
- €5M
- Jun 2026
- Valuations
- 28
- 3 club changes
Jun 2026: €5M, Everton FC. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2011-02-03 | €50k | Oldham Athletic |
| 2014-03-28 | €200k | Brentford FC |
| 2015-02-24 | €350k | Brentford FC |
| 2015-09-24 | €350k | Brentford FC |
| 2016-04-20 | €2M | Burnley FC |
| 2016-08-01 | €2M | Burnley FC |
| 2017-02-20 | €2M | Burnley FC |
| 2017-06-28 | €2M | Burnley FC |
| 2017-10-23 | €3M | Burnley FC |
| 2018-01-02 | €6M | Burnley FC |
| 2018-05-28 | €15M | Burnley FC |
| 2018-12-19 | €15M | Burnley FC |
| 2019-06-13 | €18M | Burnley FC |
| 2019-12-10 | €25M | Burnley FC |
| 2020-04-08 | €20M | Burnley FC |
| 2020-10-13 | €28M | Burnley FC |
| 2021-03-18 | €25M | Burnley FC |
| 2021-06-08 | €25M | Burnley FC |
| 2021-12-23 | €22M | Burnley FC |
| 2022-06-15 | €22M | Burnley FC |
| 2022-11-03 | €22M | Everton FC |
| 2023-06-20 | €18M | Everton FC |
| 2023-12-19 | €13M | Everton FC |
| 2024-05-27 | €13M | Everton FC |
| 2024-12-16 | €10M | Everton FC |
| 2025-05-30 | €9M | Everton FC |
| 2025-12-09 | €7M | Everton FC |
| 2026-06-03 | €5M | Everton FC |
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
- −0.100
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 →Premier League555 players · median €18M
Valued above 21% of the 555 Premier League 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 Tarkowski appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- WoodCFNottingham Forest · Premier League€5M
- NørgaardDMArsenal FC · Premier League€5M
- Ward-ProwseCMBurnley FC · Premier League€5M
- LindelöfCBAston Villa · Premier League€5M
- OrbánCBRB Leipzig · defenders€5M
- GinterCBSC Freiburg · defenders€5M
- GuerreiroLBBayern Munich · defenders€5M
- VavroCBVfL Wolfsburg · 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).