Marc Oliver
Kempf
CBGermany · Como 1907
Close-up
Image: FootyLogos
Player dossierSerie A
Marc OliverKempf
CBCentre-BackDefender
- Club
- Como 1907
- League
- Serie A
- Nationality
- Germany
- Age
- 31
- Height
- 186 cm
- Foot
- Left
- Valued
- 29 May 2026
Serie AReading the valuation
The market values Kempf at €3.5M. Model A, which never saw Kempf during training, estimates €5.5M: the market value is 36% below that estimate.
That is a factor of ×1.57. 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 €2.5M, 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
- 70
- Minutes
- 5,337
- Goals
- 4
- Assists
- 1
- Started
- 61/70
- Min / app
- 76
- Cards
- 9Y 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 Kempf…
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)
Minutes, two years
Total club minutes in the two-year window: how much the player was used.
5,337 this player2,860 defender 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
- €150k
- Jul 2012
- Peak
- €8M
- Jun 2021
- Model target
- €3.5M
- May 2026
- Valuations
- 34
- 4 club changes
May 2026: €3.5M, Como 1907. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2012-07-16 | €150k | Eintracht Frankfurt |
| 2013-01-13 | €500k | Eintracht Frankfurt |
| 2013-06-30 | €500k | Eintracht Frankfurt |
| 2014-02-12 | €1M | Eintracht Frankfurt |
| 2014-07-10 | €1.5M | Eintracht Frankfurt |
| 2015-02-04 | €3M | SC Freiburg |
| 2015-07-01 | €3M | SC Freiburg |
| 2016-02-11 | €2.8M | SC Freiburg |
| 2016-07-22 | €3.5M | SC Freiburg |
| 2017-02-07 | €3.5M | SC Freiburg |
| 2017-06-19 | €4M | SC Freiburg |
| 2017-12-28 | €4M | SC Freiburg |
| 2018-06-05 | €4M | SC Freiburg |
| 2018-08-22 | €5M | VfB Stuttgart |
| 2018-12-18 | €5M | VfB Stuttgart |
| 2019-06-05 | €6M | VfB Stuttgart |
| 2019-12-13 | €5M | VfB Stuttgart |
| 2020-04-08 | €4M | VfB Stuttgart |
| 2021-02-10 | €6M | VfB Stuttgart |
| 2021-06-09 | €8M | VfB Stuttgart |
| 2021-12-22 | €7M | VfB Stuttgart |
| 2022-03-24 | €5.5M | Hertha BSC |
| 2022-06-09 | €4.5M | Hertha BSC |
| 2022-11-09 | €4.5M | Hertha BSC |
| 2023-06-22 | €3.5M | Hertha BSC |
| 2023-10-20 | €2.8M | Hertha BSC |
| 2023-12-15 | €2M | Hertha BSC |
| 2024-06-06 | €1.5M | Hertha BSC |
| 2024-10-18 | €2M | Como 1907 |
| 2024-12-18 | €2.5M | Como 1907 |
| 2025-06-17 | €3M | Como 1907 |
| 2025-12-23 | €3M | Como 1907 |
| 2026-03-24 | €3.5M | Como 1907 |
| 2026-05-29 | €3.5M | 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
- −0.453
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 34% of the 507 Serie A 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 Kempf 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
- ModrićCMAC Milan · Serie A€3.5M
- GeaGKACF Fiorentina · Serie A€3.5M
- FüllkrugCFAC Milan · Serie A€3.5M
- SpinazzolaLBSSC Napoli · Serie A€3.5M
- DunkCBBrighton & Hove Albion · defenders€3.5M
- KlostermannCBRB Leipzig · defenders€3.5M
- OlazaLBFC Krasnodar · defenders€3.5M
- GajicRBCSKA Moscow · 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).