Zach
Muscat
CBMalta · GD Chaves
Player dossierLiga Portugal
ZachMuscat
CBCentre-BackDefender
- Club
- GD Chaves
- League
- Liga Portugal
- Nationality
- Malta
- Age
- 32
- Height
- 184 cm
- Foot
- Right
- Valued
- 22 Dec 2025
Liga PortugalReading the valuation
The market values Muscat at €150k. Model A, which never saw Muscat during training, estimates €184k: the market value is 19% below that estimate.
That is a factor of ×1.23. 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 €247k, 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
- 12
- Minutes
- 895
- Goals
- 1
- Assists
- 0
- Started
- 10/12
- Min / app
- 75
- Cards
- 4Y 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 Muscat…
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 €150k
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)
Goals per 90
Club goals per 90 minutes played in the two years to the valuation date.
0.10 this player0.03 defender median87th 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
- €75k
- Dec 2012
- Peak
- €500k
- Dec 2023
- Model target
- €150k
- Dec 2025
- Valuations
- 21
- 8 club changes
Dec 2025: €150k, GD Chaves. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2012-12-22 | €75k | Birkirkara FC |
| 2015-07-01 | €150k | Birkirkara FC |
| 2016-01-19 | €175k | SS Akragas Città dei Templi |
| 2016-06-22 | €225k | SS Akragas Città dei Templi |
| 2016-12-12 | €250k | US Arezzo |
| 2017-06-20 | €275k | US Arezzo |
| 2017-12-18 | €250k | US Arezzo |
| 2018-06-19 | €250k | US Arezzo |
| 2018-12-13 | €200k | US Pistoiese 1921 |
| 2020-11-02 | €250k | Casa Pia AC |
| 2021-06-29 | €300k | Casa Pia AC |
| 2022-04-01 | €400k | Casa Pia AC |
| 2022-06-27 | €400k | Casa Pia AC |
| 2022-12-28 | €400k | SC Farense |
| 2023-06-28 | €350k | SC Farense |
| 2023-12-27 | €500k | SC Farense |
| 2024-06-06 | €400k | SC Farense |
| 2024-10-16 | €350k | Without Club |
| 2025-04-02 | €300k | Sanliurfaspor |
| 2025-06-25 | €300k | Sanliurfaspor |
| 2025-12-22 | €150k | GD Chaves |
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
- −0.205
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 4% of the 423 Liga Portugal players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 3% of the 2,065 defenders.
See them in the Explorer →Where Muscat appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- TomanéCFAvs Futebol · Liga Portugal€150k
- GeraldesRBCasa Pia AC · Liga Portugal€150k
- CassianoCFCasa Pia AC · Liga Portugal€150k
- LimaCFFC Alverca · Liga Portugal€150k
- OdoiCBNAC Breda · defenders€150k
- LampropoulosCBOFI Crete · defenders€150k
- KolodziejczakCBParis FC · defenders€150k
- MarinakisRBOFI Crete · defenders€150k
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).