Adama
Boiro
LBSpain · Athletic Bilbao
Player dossierLaLiga
AdamaBoiro
LBLeft-BackDefender
- Club
- Athletic Bilbao
- League
- LaLiga
- Nationality
- Spain
- Age
- 23
- Height
- 183 cm
- Foot
- Left
- Valued
- 5 Jun 2026
Reading the valuation
The market values Boiro at €2.5M. Model A, which never saw Boiro during training, estimates €4.2M: the market value is 40% below that estimate.
That is a factor of ×1.67. 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 €5.5M, 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
- 44
- Minutes
- 2,805
- Goals
- 1
- Assists
- 1
- Started
- 32/44
- Min / app
- 64
- Cards
- 5Y 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 Boiro…
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 €2.5M
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.
20% this player0% defender median84th 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
- Aug 2021
- Peak
- €3M
- Dec 2025
- Model target
- €2.5M
- Jun 2026
- Valuations
- 15
- 2 club changes
Jun 2026: €2.5M, Athletic Bilbao. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2021-08-10 | €50k | CA Osasuna Promesas |
| 2021-12-30 | €50k | CA Osasuna Promesas |
| 2022-06-29 | €50k | CA Osasuna Promesas |
| 2022-12-29 | €50k | CA Osasuna Promesas |
| 2023-06-30 | €50k | CA Osasuna Promesas |
| 2023-10-13 | €150k | CA Osasuna Promesas |
| 2023-12-20 | €200k | CA Osasuna Promesas |
| 2024-03-26 | €400k | Bilbao Athletic |
| 2024-06-24 | €400k | Bilbao Athletic |
| 2024-10-11 | €1.5M | Athletic Bilbao |
| 2024-12-27 | €1.5M | Athletic Bilbao |
| 2025-03-21 | €2.5M | Athletic Bilbao |
| 2025-06-09 | €2.5M | Athletic Bilbao |
| 2025-12-12 | €3M | Athletic Bilbao |
| 2026-06-05 | €2.5M | Athletic Bilbao |
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
- −0.511
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 →Defenders, all leagues2,065 players · median €2M
Valued above 54% of the 2,065 defenders.
See them in the Explorer →Where Boiro appears
- TerminalLaLiga in the Player Explorer
- TerminalLaLiga 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
- MorenoCFVillarreal CF · LaLiga€2.5M
- LópezCMRayo Vallecano · LaLiga€2.5M
- TorróDMCA Osasuna · LaLiga€2.5M
- PickelDMRCD Espanyol Barcelona · LaLiga€2.5M
- GraditCBRC Lens · defenders€2.5M
- MainkaCB1.FC Heidenheim 1846 · defenders€2.5M
- CoufalRBTSG 1899 Hoffenheim · defenders€2.5M
- StarkCBSV Werder Bremen · defenders€2.5M
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).