Rafael
Barbosa
AMPortugal · Avs Futebol
Player dossierLiga Portugal
RafaelBarbosa
AMAttacking MidfieldMidfield
- Club
- Avs Futebol
- League
- Liga Portugal
- Nationality
- Portugal
- Age
- 29
- Height
- 173 cm
- Foot
- Right
- Valued
- 18 Dec 2025
Reading the valuation
The market values Barbosa at €300k. Model A, which never saw Barbosa during training, estimates €515k: the market value is 42% below that estimate.
That is a factor of ×1.72. 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 €814k, 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
- 34
- Minutes
- 1,622
- Goals
- 1
- Assists
- 3
- Started
- 18/34
- Min / app
- 48
- 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 Barbosa…
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 €300k
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)
Assists per 90
Club assists per 90 minutes in the same window.
0.17 this player0.09 midfielder median76th 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
- €25k
- Jul 2015
- Peak
- €1.3M
- Jun 2018
- Model target
- €300k
- Dec 2025
- Valuations
- 23
- 8 club changes
Dec 2025: €300k, Avs Futebol. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2015-07-31 | €25k | Sporting CP B |
| 2016-03-14 | €125k | Sporting CP B |
| 2016-09-30 | €200k | CF União Madeira (-2021) |
| 2017-06-30 | €200k | Sporting CP B |
| 2017-09-08 | €400k | Sporting CP B |
| 2018-02-23 | €900k | Sporting CP B |
| 2018-06-29 | €1.3M | Sporting CP B |
| 2019-02-12 | €750k | FC Paços de Ferreira |
| 2019-06-29 | €650k | FC Paços de Ferreira |
| 2019-12-31 | €450k | GD Estoril Praia |
| 2020-04-08 | €350k | GD Estoril Praia |
| 2020-10-22 | €350k | CD Tondela |
| 2021-01-28 | €500k | CD Tondela |
| 2021-05-21 | €500k | CD Tondela |
| 2021-12-27 | €500k | CD Tondela |
| 2022-05-31 | €500k | CD Tondela |
| 2022-12-28 | €500k | CD Tondela |
| 2023-06-28 | €700k | CD Tondela |
| 2023-12-27 | €500k | SC Farense |
| 2024-06-06 | €600k | SC Farense |
| 2024-12-19 | €400k | SC Farense |
| 2025-06-06 | €350k | Radomiak Radom |
| 2025-12-18 | €300k | Avs Futebol |
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
- −0.541
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 8% of the 423 Liga Portugal players.
See them in the Explorer →Midfielders, all leagues1,687 players · median €2M
Valued above 7% of the 1,687 midfielders.
See them in the Explorer →Where Barbosa appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- PizziAMGD Estoril Praia · Liga Portugal€300k
- GómezCBFC Alverca · Liga Portugal€300k
- VenâncioCBCD Santa Clara · Liga Portugal€300k
- CharlesGKVitória Guimarães SC · Liga Portugal€300k
- TrejoAMRayo Vallecano · midfielders€300k
- HoltbyCMNAC Breda · midfielders€300k
- SchwabCMHolstein Kiel · midfielders€300k
- KalitvintsevAMMetalist 1925 Kharkiv · midfielders€300k
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).