Vitezslav
Jaros
GKCzech Republic · Ajax Amsterdam
Image: FootyLogos
Player dossierEredivisie
VitezslavJaros
GKGoalkeeperGoalkeeper
- Club
- Ajax Amsterdam
- League
- Eredivisie
- Nationality
- Czech Republic
- Age
- 24
- Height
- 190 cm
- Foot
- Right
- Valued
- 28 May 2026
EredivisieReading the valuation
The market values Jaros at €5M. Model A, which never saw Jaros during training, estimates €2.4M: the market value is 110% above that estimate.
That is a factor of ×2.10. 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 €3M, 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
- 27
- Minutes
- 2,351
- Started
- 26/27
- Min / app
- 87
- Cards
- 1Y 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 Jaros…
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 €5M
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 485 goalkeepers
Dashed ring: the goalkeeper median (50th percentile)
European club minutes
Share of minutes played in UEFA club competitions.
23% this player0% goalkeeper 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
- Aug 2021
- Peak
- €6M
- Oct 2025
- Model target
- €5M
- May 2026
- Valuations
- 12
- 6 club changes
May 2026: €5M, Ajax Amsterdam. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2021-08-01 | €75k | St. Patrick's Athletic |
| 2021-12-28 | €100k | Liverpool FC U23 |
| 2023-04-06 | €150k | Stockport County |
| 2023-10-09 | €250k | Liverpool FC |
| 2023-12-19 | €250k | Liverpool FC |
| 2024-03-11 | €1M | SK Sturm Graz |
| 2024-05-21 | €5M | SK Sturm Graz |
| 2024-12-16 | €5M | Liverpool FC |
| 2025-05-30 | €4M | Liverpool FC |
| 2025-10-02 | €6M | Ajax Amsterdam |
| 2025-12-02 | €5M | Ajax Amsterdam |
| 2026-05-28 | €5M | Ajax Amsterdam |
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
- +0.744
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 →Eredivisie425 players · median €1M
Valued above 80% of the 425 Eredivisie players.
See them in the Explorer →Goalkeepers, all leagues485 players · median €1M
Valued above 79% of the 485 goalkeepers.
See them in the Explorer →Where Jaros appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- WellenreutherGKFeyenoord Rotterdam · Eredivisie€5M
- RosaRBAjax Amsterdam · Eredivisie€5M
- RegeerDMAjax Amsterdam · Eredivisie€5M
- MeerveldAMSC Heerenveen · Eredivisie€5M
- PopeGKNewcastle United · goalkeepers€5M
- ArrizabalagaGKArsenal FC · goalkeepers€5M
- BayındırGKManchester United · goalkeepers€5M
- CarevićGKFC Famalicão · goalkeepers€5M
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).