Jayden
Addai
RWNetherlands · Como 1907
Image: FootyLogos
Player dossierSerie A
JaydenAddai
RWRight WingerAttack
- Club
- Como 1907
- League
- Serie A
- Nationality
- Netherlands
- Age
- 20
- Height
- 177 cm
- Foot
- Left
- Valued
- 29 May 2026
Serie AReading the valuation
The market values Addai at €20M. Model A, which never saw Addai during training, estimates €11.7M: the market value is 70% above that estimate.
That is a factor of ×1.70. 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 €3.5M, 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
- 39
- Minutes
- 1,570
- Goals
- 6
- Assists
- 1
- Started
- 17/39
- Min / app
- 40
- 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 Addai…
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 €20M
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)
European club minutes
Share of minutes played in UEFA club competitions.
12% this player0% attacker median74th 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
- Jun 2022
- Peak
- €20M
- Dec 2025
- Model target
- €20M
- May 2026
- Valuations
- 10
- 3 club changes
May 2026: €20M, Como 1907. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2022-06-23 | €150k | AZ Alkmaar U18 |
| 2023-07-04 | €400k | AZ Alkmaar U21 |
| 2024-01-08 | €800k | AZ Alkmaar |
| 2024-03-18 | €1M | AZ Alkmaar |
| 2024-06-10 | €1M | AZ Alkmaar |
| 2024-12-17 | €1.5M | AZ Alkmaar |
| 2025-05-28 | €1.5M | AZ Alkmaar |
| 2025-10-07 | €10M | Como 1907 |
| 2025-12-23 | €20M | Como 1907 |
| 2026-05-29 | €20M | Como 1907 |
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
- +0.532
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 →Serie A507 players · median €5.5M
Valued above 82% of the 507 Serie A players.
See them in the Explorer →Attackers, all leagues1,583 players · median €2.5M
Valued above 87% of the 1,583 attackers.
See them in the Explorer →Where Addai appears
- TerminalSerie A in the Player Explorer
- TerminalSerie A on the League Landscape
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- MaignanGKAC Milan · Serie A€20M
- Milinković-SavićGKSSC Napoli · Serie A€20M
- SaelemaekersRMAC Milan · Serie A€20M
- GilmourDMSSC Napoli · Serie A€20M
- SanéRWGalatasaray · attackers€20M
- GrealishLWEverton FC · attackers€20M
- IwobiLWFulham FC · attackers€20M
- AktürkoğluLWFenerbahce · attackers€20M
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).