Brayan
Medina
CBColombia · CD Tondela
Player dossierLiga Portugal
BrayanMedina
CBCentre-BackDefender
- Club
- CD Tondela
- League
- Liga Portugal
- Nationality
- Colombia
- Age
- 24
- Height
- 195 cm
- Foot
- Left
- Valued
- 28 May 2026
Liga PortugalReading the valuation
The market values Medina at €3M. Model A, which never saw Medina during training, estimates €1.3M: the market value is 129% above that estimate.
That is a factor of ×2.29. 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 €2M, 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
- 26
- Minutes
- 2,244
- Goals
- 0
- Assists
- 1
- Started
- 26/26
- Min / app
- 86
- Cards
- 9Y 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 Medina…
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 €3M
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
- €100k
- Jun 2022
- Peak
- €4M
- Mar 2026
- Model target
- €3M
- May 2026
- Valuations
- 12
- 3 club changes
May 2026: €3M, CD Tondela. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2022-06-17 | €100k | CD América de Cali |
| 2022-12-12 | €100k | CD América de Cali |
| 2023-07-12 | €250k | CD América de Cali |
| 2023-12-07 | €250k | Independiente Yumbo |
| 2024-06-27 | €400k | Independiente Yumbo |
| 2024-12-10 | €700k | CD América de Cali |
| 2025-04-07 | €1M | CD América de Cali |
| 2025-06-20 | €900k | CD América de Cali |
| 2025-09-30 | €2M | CD Tondela |
| 2025-12-18 | €2M | CD Tondela |
| 2026-03-19 | €4M | CD Tondela |
| 2026-05-28 | €3M | CD Tondela |
Audit context group-level, not about this player
- Audit group
- non-UEFA
- Population gap, Model A
- +0.093 95% CI +0.063 to +0.124
- This player, market vs held-out A
- +0.827
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 67% of the 423 Liga Portugal players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 59% of the 2,065 defenders.
See them in the Explorer →Where Medina appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- BrumaLWSL Benfica · Liga Portugal€3M
- SantosLBSporting CP · Liga Portugal€3M
- FerreiraDMCD Santa Clara · Liga Portugal€3M
- SánchezRBGD Estoril Praia · Liga Portugal€3M
- AlabaCBReal Madrid · defenders€3M
- VrijCBInter Milan · defenders€3M
- KeaneCBEverton FC · defenders€3M
- WeiserRBSV Werder Bremen · defenders€3M
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).