Jordan
Lotomba
RBSwitzerland · Feyenoord Rotterdam
Player dossierEredivisie
JordanLotomba
RBRight-BackDefender
- Club
- Feyenoord Rotterdam
- League
- Eredivisie
- Nationality
- Switzerland
- Age
- 27
- Height
- 177 cm
- Foot
- Right
- Valued
- 28 May 2026
EredivisieReading the valuation
The market values Lotomba at €3.5M. Model A, which never saw Lotomba during training, estimates €4.6M: the market value is 23% below that estimate.
That is a factor of ×1.30. 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 €4.7M, 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
- 41
- Minutes
- 2,348
- Goals
- 1
- Assists
- 4
- Started
- 25/41
- Min / app
- 57
- 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 Lotomba…
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 €3.5M
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 2,065 defenders
Dashed ring: the defender median (50th percentile)
European club minutes
Share of minutes played in UEFA club competitions.
35% this player0% defender median97th 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
- Dec 2015
- Peak
- €8M
- Jun 2023
- Model target
- €3.5M
- May 2026
- Valuations
- 27
- 3 club changes
May 2026: €3.5M, Feyenoord Rotterdam. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2015-12-18 | €50k | FC Lausanne-Sport |
| 2016-07-16 | €400k | FC Lausanne-Sport |
| 2016-12-20 | €700k | FC Lausanne-Sport |
| 2017-07-12 | €700k | BSC Young Boys |
| 2017-09-29 | €1.5M | BSC Young Boys |
| 2018-01-08 | €1.5M | BSC Young Boys |
| 2018-04-24 | €3M | BSC Young Boys |
| 2018-07-12 | €4.5M | BSC Young Boys |
| 2019-01-21 | €4.5M | BSC Young Boys |
| 2019-04-15 | €4.5M | BSC Young Boys |
| 2019-06-04 | €4.5M | BSC Young Boys |
| 2020-01-06 | €4.5M | BSC Young Boys |
| 2020-04-08 | €4M | BSC Young Boys |
| 2020-07-31 | €4M | BSC Young Boys |
| 2020-10-15 | €6M | OGC Nice |
| 2021-05-25 | €6M | OGC Nice |
| 2021-12-16 | €6M | OGC Nice |
| 2022-05-30 | €7M | OGC Nice |
| 2022-11-02 | €6M | OGC Nice |
| 2023-06-27 | €8M | OGC Nice |
| 2023-12-18 | €8M | OGC Nice |
| 2024-06-03 | €8M | OGC Nice |
| 2024-12-17 | €8M | Feyenoord Rotterdam |
| 2025-05-28 | €6.5M | Feyenoord Rotterdam |
| 2025-12-02 | €5M | Feyenoord Rotterdam |
| 2026-03-11 | €3.5M | Feyenoord Rotterdam |
| 2026-05-28 | €3.5M | Feyenoord Rotterdam |
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
- −0.265
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 74% of the 425 Eredivisie players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 63% of the 2,065 defenders.
See them in the Explorer →Where Lotomba appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- LauritsenCFSparta Rotterdam · Eredivisie€3.5M
- WitAMFC Utrecht · Eredivisie€3.5M
- LarinCFFeyenoord Rotterdam · Eredivisie€3.5M
- SurayLWGo Ahead Eagles · Eredivisie€3.5M
- SpinazzolaLBSSC Napoli · defenders€3.5M
- DunkCBBrighton & Hove Albion · defenders€3.5M
- KempfCBComo 1907 · defenders€3.5M
- KlostermannCBRB Leipzig · defenders€3.5M
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).