Leonardo
Buta
LBPortugal · Rio Ave FC
Player dossierLiga Portugal
LeonardoButa
LBLeft-BackDefender
- Club
- Rio Ave FC
- League
- Liga Portugal
- Nationality
- Portugal
- Age
- 23
- Height
- 182 cm
- Foot
- Left
- Valued
- 28 May 2026
Reading the valuation
The market values Buta at €1M. Model A, which never saw Buta during training, estimates €319k: the market value is 213% above that estimate.
That is a factor of ×3.13. 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 €516k, 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
- 12
- Minutes
- 687
- Goals
- 0
- Assists
- 0
- Started
- 7/12
- Min / app
- 57
- Cards
- 2Y 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 Buta…
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 €1M
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
- €450k
- Jun 2021
- Peak
- €3M
- Jun 2024
- Model target
- €1M
- May 2026
- Valuations
- 10
- 5 club changes
May 2026: €1M, Rio Ave FC. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2021-06-29 | €450k | SC Braga U23 |
| 2022-09-27 | €2M | Udinese Calcio |
| 2022-11-11 | €2M | Udinese Calcio |
| 2023-06-15 | €1.5M | Udinese Calcio |
| 2023-12-27 | €2M | Gil Vicente FC |
| 2024-06-06 | €3M | Gil Vicente FC |
| 2024-12-19 | €2.5M | Moreirense FC |
| 2025-05-30 | €2M | Moreirense FC |
| 2025-12-30 | €1.5M | SD Eibar |
| 2026-05-28 | €1M | Rio Ave 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
- +1.143
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 →Liga Portugal423 players · median €1M
Valued above 42% of the 423 Liga Portugal players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 35% of the 2,065 defenders.
See them in the Explorer →Where Buta appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- OtamendiCBSL Benfica · Liga Portugal€1M
- SoaresLBFC Famalicão · Liga Portugal€1M
- ZlobinGKFC Famalicão · Liga Portugal€1M
- FerroCBGD Estoril Praia · Liga Portugal€1M
- AzpilicuetaCBSevilla FC · defenders€1M
- KaravaevRBDynamo Kyiv · defenders€1M
- BerchicheLBAthletic Bilbao · defenders€1M
- MandiCBLOSC Lille · defenders€1M
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).