Boy Kemper
Value picture
Where the market, the likely price and the model estimates sit.
The model rates Boy Kemper's performance-implied value at EUR 0.5M-0.8M, above the estimated acquisition range of EUR 0.3M-1.1M. Its 24-month market value projection is EUR 0.6M-1.5M. Confidence is medium: no event-level data (xG, progressive actions) is available from the current free source, and injury history is unavailable.
Acquisition note: Contract end date unavailable: range widened by 15% each side.
Bargain Index: 82
What drives the score. Not a black box: each component and its level.
| Performance | Below average | 24.9th pct among DEF peers (age-neutral) |
| Age | Neutral | 27 years |
| Acquisition cost | Very favorable | est. €556k vs market €1.0M |
| Expected appreciation | Low | -22% over ~2 years (model) |
| Value gap | Small | weak predictor on its own |
| Development | Low | |
| League translation | Uncertain | league coefficient 0.43 |
| Tactical fit | Not evaluated | Requires event/role data not available from the current free source. |
| Risk | Moderate | |
| Data confidence | Medium |
Bargain Index = percentile (among all evaluated players) of expected 2-year value relative to estimated cost. See methodology and backtests.
Market value history
Market value ≠ transfer fee ≠ acquisition cost.
Profile vs positional peers
Percentiles among 1268 evaluated DEF players with 900+ minutes.
Performance (last season, league)
- Minutes
- 2821 (92% of available)
- Goals + assists / 90
- 0.29
- Context-adjusted G+A / 90
- 0.29
- xG, xA, progression
- Data unavailable
- Defensive actions
- Data unavailable
- Performance percentile
- 25 (Below average)
Adjusted = shrunk toward positional baseline for small samples, corrected for team dominance over opponents, expressed relative to positional peers in the same league.
Context
- League strength
- 0.43 (rank 15)
- Team strength (Elo)
- 1118
- Opponent strength
- 1319
- Possession, role
- Data unavailable
League strength 1.00 = average club of the big-five leagues. Elo includes continental matches.
Potential
- Development
- Low
- Trajectory
- improving
- Breakout probability
- Age > 23
- Resale range (24m)
- €584k – €1.5M
Trajectory drivers: relative output up 46% vs positional peers.
Historical comparables (8): median 2-year value change -7% (IQR -25% to +37%).
Risk profile
Overall: Moderate
- ⚠League level coefficient 0.43 (1.00 = big-five average): output may not translate.
- ⚠No continental-competition minutes last season.
- ⓘContract end date unavailable (or stale in source).
- ⓘInjury history unavailable from current data source.
League translation
What happened to players who moved from this league to the big-five leagues (observed, not a forecast).
- Historical movers
- 82 (DEF)
- Relative output kept
- 65%–166%
- Held a regular role (900+ min)
- 78%
- Confidence
- Medium
Output is relative to positional peers in each league. Movers are a selected group (clubs buy players who fit), so treat this as context, not a guarantee.
Season-by-season (domestic league)
Context-adjusted values are model outputs.
| Season | Club | League | Pos | Apps | Min | Min share | G | A | G+A/90 | Adj. G+A/90 | Opp. Elo | Team Elo | League str. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/26 | NAC Breda | Eredivisie | LB | 32 | 2821 | 92% | 5 | 4 | 0.29 | 0.29 | 1319 | 1118 | 0.43 |
| 2024/25 | NAC Breda | Eredivisie | LB | 29 | 2411 | 79% | 1 | 3 | 0.15 | 0.19 | 1316 | 1125 | 0.50 |
| 2020/21 | ADO Den Haag | Eredivisie | LB | 26 | 2026 | 66% | 1 | 0 | 0.04 | 0.09 | 1345 | 1142 | 0.56 |
Cups & continental competitions
| Season | Competition | Club | Apps | Min | G | A | Avg opp. Elo |
|---|---|---|---|---|---|---|---|
| 2025/26 | Knvb Beker | NAC Breda | 1 | 90 | 1 | 0 | — |
| 2020/21 | Knvb Beker | ADO Den Haag | 2 | 171 | 0 | 0 | — |
Small continental samples are shown for context only and are not over-weighted.
Historical comparables
Most similar profiles 2+ years ago (same position group) and what happened next. Chosen by similarity only — failures included.
| Player (then) | Age | Value then | ~2y later | Outcome |
|---|---|---|---|---|
| Justin Hoogma Eredivisie · 2024 | 26 | €900k | €500k | fell |
| Pavlo Pashayev Premier Liga · 2015 | 27 | €700k | €600k | flat |
| Derek Cornelius Super League 1 · 2022 | 25 | €800k | €2.8M | rose |
| Dimitrios Goutas Super League 1 · 2021 | 27 | €700k | €2.7M | rose |
| Jop van der Linden Eredivisie · 2015 | 25 | €1.0M | €500k | fell |
| Petro Stasyuk Premier Liga · 2022 | 27 | €500k | €500k | flat |
| Guy-Marcelin Kilama Super Lig · 2024 | 25 | €1.3M | €1.3M | flat |
| Daniel Adejo Super League 1 · 2015 | 26 | €600k | €500k | flat |
Transfer history
Fees as reported by the source; undisclosed fees shown as unknown, never estimated.
| Date | From | To | Fee | MV at time |
|---|---|---|---|---|
| 1 Jul 2026 | NAC Breda | Without Club | Unknown | €1.0M |
| 1 Jul 2023 | ADO Den Haag | NAC Breda | Free / loan | €450k |
| 17 Jul 2020 | Ajax U21 | ADO Den Haag | Unknown | €400k |
| 1 Jul 2018 | Ajax U19 | Ajax U21 | Unknown | €150k |
| 1 Jul 2016 | Volendam U17 | Ajax U19 | Unknown | Data unavailable |
| 1 Jul 2015 | Volendam Youth | Volendam U17 | Unknown | Data unavailable |
MoneyballAI identifies statistical opportunities from available data. A player flagged as a potential bargain is not guaranteed to succeed, to transfer, to rise in value, or to generate resale profit. Market values, fees and contracts come from third-party sources; ranges are model estimates with stated confidence.