Óscar
Trejo
AMArgentina · Rayo Vallecano
Player dossierLaLiga
ÓscarTrejo
AMAttacking MidfieldMidfield
- Club
- Rayo Vallecano
- League
- LaLiga
- Nationality
- Argentina
- Age
- 38
- Height
- 180 cm
- Foot
- Right
- Valued
- 5 Jun 2026
LaLigaReading the valuation
The market values Trejo at €300k. Model A, which never saw Trejo during training, estimates €368k: 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 €289k, 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
- 35
- Minutes
- 1,296
- Goals
- 5
- Assists
- 2
- Started
- 16/35
- Min / app
- 37
- 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 Trejo…
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 €300k
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 1,687 midfielders
Dashed ring: the midfielder median (50th percentile)
Goals per 90
Club goals per 90 minutes played in the two years to the valuation date.
0.35 this player0.08 midfielder median96th 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
- €50k
- Jul 2007
- Peak
- €4M
- Mar 2008
- Model target
- €300k
- Jun 2026
- Valuations
- 47
- 5 club changes
Jun 2026: €300k, Rayo Vallecano. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2007-07-25 | €50k | RCD Mallorca |
| 2007-07-26 | €100k | RCD Mallorca |
| 2007-08-27 | €2.5M | RCD Mallorca |
| 2008-02-04 | €2.8M | RCD Mallorca |
| 2008-03-12 | €4M | RCD Mallorca |
| 2008-07-15 | €4M | RCD Mallorca |
| 2009-01-22 | €3.4M | RCD Mallorca |
| 2009-07-23 | €1.8M | RCD Mallorca |
| 2009-11-23 | €1.4M | Elche CF |
| 2010-04-05 | €1.4M | Elche CF |
| 2010-08-20 | €1.4M | Rayo Vallecano |
| 2011-02-04 | €1.5M | Rayo Vallecano |
| 2011-08-08 | €2.5M | Sporting Gijón |
| 2012-02-05 | €2.5M | Sporting Gijón |
| 2012-10-04 | €2M | Sporting Gijón |
| 2013-01-22 | €2M | Sporting Gijón |
| 2013-05-10 | €2M | Sporting Gijón |
| 2014-01-14 | €2.3M | FC Toulouse |
| 2014-08-07 | €2M | FC Toulouse |
| 2015-01-14 | €2M | FC Toulouse |
| 2015-06-06 | €2M | FC Toulouse |
| 2016-02-04 | €2M | FC Toulouse |
| 2016-07-13 | €2.3M | FC Toulouse |
| 2017-01-16 | €2.3M | FC Toulouse |
| 2017-06-01 | €2.5M | FC Toulouse |
| 2018-01-01 | €2M | Rayo Vallecano |
| 2018-05-30 | €2M | Rayo Vallecano |
| 2018-12-21 | €2.5M | Rayo Vallecano |
| 2019-06-11 | €2M | Rayo Vallecano |
| 2019-12-20 | €2M | Rayo Vallecano |
| 2020-04-08 | €1.6M | Rayo Vallecano |
| 2020-10-08 | €1.2M | Rayo Vallecano |
| 2020-11-23 | €1M | Rayo Vallecano |
| 2021-01-08 | €800k | Rayo Vallecano |
| 2021-06-24 | €800k | Rayo Vallecano |
| 2021-12-30 | €3M | Rayo Vallecano |
| 2022-06-03 | €3M | Rayo Vallecano |
| 2022-11-07 | €3M | Rayo Vallecano |
| 2023-06-13 | €3M | Rayo Vallecano |
| 2023-10-13 | €2.5M | Rayo Vallecano |
| 2023-12-22 | €2M | Rayo Vallecano |
| 2024-03-21 | €1.5M | Rayo Vallecano |
| 2024-06-07 | €1M | Rayo Vallecano |
| 2024-12-27 | €800k | Rayo Vallecano |
| 2025-06-09 | €500k | Rayo Vallecano |
| 2025-12-12 | €400k | Rayo Vallecano |
| 2026-06-05 | €300k | Rayo Vallecano |
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
- −0.205
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 →Midfielders, all leagues1,687 players · median €2M
Valued above 7% of the 1,687 midfielders.
See them in the Explorer →Where Trejo appears
- TerminalLaLiga in the Player Explorer
- TerminalLaLiga 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
- MiguelGKReal Betis Balompié · LaLiga€300k
- BigasCBElche CF · LaLiga€300k
- BrasanacCMMálaga CF · LaLiga€400k
- CazorlaCMReal Oviedo · LaLiga€200k
- HoltbyCMNAC Breda · midfielders€300k
- PizziAMGD Estoril Praia · midfielders€300k
- SchwabCMHolstein Kiel · midfielders€300k
- KalitvintsevAMMetalist 1925 Kharkiv · midfielders€300k
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).