Daníel Leó
Grétarsson
CBIceland · Sönderjyske Fodbold
Player dossierSuperliga
Daníel LeóGrétarsson
CBCentre-BackDefender
- Club
- Sönderjyske Fodbold
- League
- Superliga
- Nationality
- Iceland
- Age
- 30
- Height
- 185 cm
- Foot
- Left
- Valued
- 25 May 2026
SuperligaReading the valuation
The market values Grétarsson at €450k. Model A, which never saw Grétarsson during training, estimates €739k: the market value is 39% below that estimate.
That is a factor of ×1.64. 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 €696k, 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
- 2,919
- Goals
- 2
- Assists
- 3
- Started
- 34/35
- Min / app
- 83
- Cards
- 7Y 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 Grétarsson…
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 €450k
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)
Starts
Share of appearances started rather than entered from the bench.
97% this player83% defender median90th 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
- €25k
- Dec 2012
- Peak
- €500k
- Jun 2025
- Model target
- €450k
- May 2026
- Valuations
- 20
- 4 club changes
May 2026: €450k, Sönderjyske Fodbold. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2012-12-06 | €25k | UMF Grindavík |
| 2015-08-19 | €100k | Aalesunds FK |
| 2015-12-27 | €100k | Aalesunds FK |
| 2016-12-18 | €200k | Aalesunds FK |
| 2017-12-23 | €200k | Aalesunds FK |
| 2018-12-30 | €150k | Aalesunds FK |
| 2019-12-29 | €400k | Aalesunds FK |
| 2020-04-08 | €325k | Aalesunds FK |
| 2020-07-25 | €400k | Aalesunds FK |
| 2021-06-30 | €300k | Blackpool FC |
| 2021-11-24 | €300k | Blackpool FC |
| 2022-06-14 | €250k | Slask Wroclaw |
| 2022-09-29 | €450k | Slask Wroclaw |
| 2023-06-09 | €350k | Slask Wroclaw |
| 2023-12-21 | €350k | Sönderjyske Fodbold |
| 2024-06-18 | €350k | Sönderjyske Fodbold |
| 2024-12-09 | €450k | Sönderjyske Fodbold |
| 2025-06-16 | €500k | Sönderjyske Fodbold |
| 2025-12-15 | €500k | Sönderjyske Fodbold |
| 2026-05-25 | €450k | Sönderjyske Fodbold |
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
- −0.497
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 →Superliga256 players · median €800k
Valued above 23% of the 256 Superliga players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 17% of the 2,065 defenders.
See them in the Explorer →Where Grétarsson appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- BrandhofCMAC Horsens · Superliga€450k
- BuurRBLyngby Boldklub · Superliga€450k
- KirkegaardRWAC Horsens · Superliga€450k
- NielsenLBAalborg BK · Superliga€450k
- CresswellLBStoke City · defenders€450k
- MagnússonCBLevadiakos · defenders€450k
- JohanssonCBHolstein Kiel · defenders€450k
- DeligiannidisRBAsteras Aktor · defenders€450k
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).