Gaby
Jean
CBFrance · US Lecce
Player dossierSerie A
GabyJean
CBCentre-BackDefender
- Club
- US Lecce
- League
- Serie A
- Nationality
- France
- Age
- 26
- Height
- 191 cm
- Foot
- Left
- Valued
- 29 May 2026
Serie AReading the valuation
The market values Jean at €1.5M. Model A, which never saw Jean during training, estimates €2.1M: the market value is 29% below that estimate.
That is a factor of ×1.42. 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 €1.7M, 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
- 27
- Minutes
- 1,669
- Goals
- 0
- Assists
- 0
- Started
- 18/27
- Min / app
- 62
- 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 Jean…
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 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.
0% this player0% defender median30th 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
- €600k
- Oct 2022
- Peak
- €2M
- Mar 2025
- Model target
- €1.5M
- May 2026
- Valuations
- 12
- 1 club change
May 2026: €1.5M, US Lecce. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2022-10-28 | €600k | FC Annecy |
| 2023-04-06 | €800k | FC Annecy |
| 2023-06-16 | €900k | FC Annecy |
| 2023-12-13 | €900k | FC Annecy |
| 2024-06-11 | €900k | FC Annecy |
| 2024-10-18 | €1M | US Lecce |
| 2024-12-18 | €1M | US Lecce |
| 2025-03-25 | €2M | US Lecce |
| 2025-06-17 | €2M | US Lecce |
| 2025-12-23 | €2M | US Lecce |
| 2026-03-24 | €1.5M | US Lecce |
| 2026-05-29 | €1.5M | US Lecce |
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
- −0.348
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 →Serie A507 players · median €5.5M
Valued above 15% of the 507 Serie A players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 43% of the 2,065 defenders.
See them in the Explorer →Where Jean appears
- TerminalSerie A in the Player Explorer
- TerminalSerie A on the League Landscape
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- JesusCBSSC Napoli · Serie A€1.5M
- PatricCBSS Lazio · Serie A€1.5M
- BelottiCFCagliari Calcio · Serie A€1.5M
- HernaniCMParma Calcio 1913 · Serie A€1.5M
- TraunerCBFeyenoord Rotterdam · defenders€1.5M
- KüblerRBSC Freiburg · defenders€1.5M
- WalkerRBBurnley FC · defenders€1.5M
- TrippierRBNewcastle United · defenders€1.5M
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).