Oskar
Pietuszewski
LWPoland · FC Porto
Close-up
Image: FootyLogos
Player dossierLiga Portugal
OskarPietuszewski
LWLeft WingerAttack
- Club
- FC Porto
- League
- Liga Portugal
- Nationality
- Poland
- Age
- 18
- Height
- 179 cm
- Foot
- Right
- Valued
- 28 May 2026
Liga PortugalReading the valuation
The market values Pietuszewski at €25M. Model A, which never saw Pietuszewski during training, estimates €27.2M: the market value is 8% below that estimate.
That is a factor of ×1.09. 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 €15.1M, 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
- 23
- Minutes
- 1,113
- Goals
- 3
- Assists
- 4
- Started
- 14/23
- Min / app
- 48
- Cards
- 3Y 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 Pietuszewski…
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 €25M
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 1,583 attackers
Dashed ring: the attacker median (50th percentile)
Assists per 90
Club assists per 90 minutes in the same window.
0.32 this player0.15 attacker median93rd 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
- €150k
- Dec 2024
- Peak
- €25M
- May 2026
- Model target
- €25M
- May 2026
- Valuations
- 7
- 1 club change
May 2026: €25M, FC Porto. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2024-12-09 | €150k | Jagiellonia Bialystok |
| 2025-04-03 | €1M | Jagiellonia Bialystok |
| 2025-06-06 | €2.5M | Jagiellonia Bialystok |
| 2025-09-26 | €8M | Jagiellonia Bialystok |
| 2025-12-08 | €12M | Jagiellonia Bialystok |
| 2026-03-19 | €20M | FC Porto |
| 2026-05-28 | €25M | FC Porto |
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
- −0.086
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 93% of the 423 Liga Portugal players.
See them in the Explorer →Attackers, all leagues1,583 players · median €2.5M
Valued above 90% of the 1,583 attackers.
See them in the Explorer →Where Pietuszewski appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- GonçalvesLWSporting CP · Liga Portugal€25M
- TrubinGKSL Benfica · Liga Portugal€25M
- SudakovAMSL Benfica · Liga Portugal€25M
- SilvaCBSL Benfica · Liga Portugal€25M
- WilsonRWFulham FC · attackers€25M
- ScamaccaCFAtalanta BC · attackers€25M
- WatkinsCFAston Villa · attackers€25M
- NkunkuCFAC Milan · attackers€25M
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).