Sacha Boey
Value picture
Where the market, the likely price and the model estimates sit.
The model rates Sacha Boey's performance-implied value at EUR 4.5M-14.0M, below the estimated acquisition range of EUR 4.4M-10.3M. Its 24-month market value projection is EUR 3.5M-13.6M. Confidence is medium: no event-level data (xG, progressive actions) is available from the current free source, and injury history is unavailable.
Bargain Index: 29
What drives the score. Not a black box: each component and its level.
| Performance | Above average | 74.6th pct among DEF peers (age-neutral) |
| Age | Neutral | 25.8 years |
| Acquisition cost | Favorable | est. €8.3M vs market €10.0M |
| Expected appreciation | Very low | -30% over ~2 years (model) |
| Value gap | Negative | weak predictor on its own |
| Development | Moderate | |
| League translation | Uncertain | league coefficient 0.4 |
| Tactical fit | Not evaluated | Requires event/role data not available from the current free source. |
| Risk | Very High | |
| 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
- 1022 (33% of available)
- Goals + assists / 90
- 0.09
- Context-adjusted G+A / 90
- 0.09
- xG, xA, progression
- Data unavailable
- Defensive actions
- Data unavailable
- Performance percentile
- 75 (Above 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
- 0.40 (rank 3)
- Team strength (Elo)
- 1668
- Opponent strength
- 1231
- Possession, role
- Data unavailable
League strength 1.00 = average club of the big-five leagues. Elo includes continental matches.
Potential
- Development
- Moderate
- Trajectory
- declining
- Breakout probability
- Age > 23
- Resale range (24m)
- €3.5M – €13.6M
Trajectory drivers: changed club; team strength down (-104 Elo); league level down (-122 Elo); relative output down 45% vs positional peers.
Historical comparables (8): median 2-year value change -49% (IQR -63% to -1%).
Risk profile
Overall: Very High
- ▲Projection range among the widest 10% of evaluated players.
- ⚠Limited sample: 1022 league minutes last season.
- ⚠League level coefficient 0.40 (1.00 = big-five average): output may not translate.
- ⚠Played under 40% of available league minutes (injury data unavailable, cause unknown).
- ⚠Declining trajectory versus previous season.
- ⓘ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
- 50 (DEF)
- Relative output kept
- 68%–191%
- Held a regular role (900+ min)
- 54%
- 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 | Galatasaray | Super Lig | RB | 11 | 560 | 18% | 1 | 0 | 0.16 | 0.09 | 1231 | 1501 | 0.40 |
| 2025/26 | Bayern Munich | Bundesliga | RB | 9 | 462 | 15% | 0 | 0 | 0.00 | 0.04 | 1522 | 1871 | 0.94 |
| 2024/25 | Bayern Munich | Bundesliga | RB | 13 | 594 | 19% | 0 | 2 | 0.30 | 0.12 | 1444 | 1772 | 0.94 |
| 2023/24 | Galatasaray | Super Lig | RB | 19 | 1710 | 50% | 1 | 0 | 0.05 | 0.05 | 1294 | 1597 | 0.45 |
| 2023/24 | Bayern Munich | Bundesliga | RB | 2 | 109 | 4% | 0 | 0 | 0.00 | 0.10 | 1673 | 1715 | 1.01 |
| 2022/23 | Galatasaray | Super Lig | RB | 31 | 2714 | 84% | 1 | 4 | 0.17 | 0.13 | 1299 | 1535 | 0.50 |
| 2021/22 | Galatasaray | Super Lig | RB | 13 | 1069 | 31% | 0 | 0 | 0.00 | 0.05 | 1268 | 1326 | 0.42 |
| 2020/21 | Dijon FCO | Ligue 1 | RB | 24 | 1865 | 55% | 0 | 1 | 0.05 | 0.11 | 1446 | 1211 | 0.75 |
| 2020/21 | Stade Rennais FC | Ligue 1 | RB | 2 | 125 | 4% | 0 | 0 | 0.00 | 0.10 | 1431 | 1445 | 0.75 |
| 2019/20 | Stade Rennais FC | Ligue 1 | RB | 5 | 169 | 7% | 0 | 1 | 0.53 | 0.23 | 1464 | 1507 | 0.82 |
| 2018/19 | FC Toulouse | Ligue 1 | RB | 1 | 13 | 0% | 0 | 0 | 0.00 | 0.17 | 1479 | 1317 | 0.82 |
Cups & continental competitions
| Season | Competition | Club | Apps | Min | G | A | Avg opp. Elo |
|---|---|---|---|---|---|---|---|
| 2025/26 | Uefa Champions League | Galatasaray | 4 | 116 | 1 | 0 | 1662 |
| 2025/26 | Dfb Pokal | Bayern Munich | 2 | 80 | 0 | 1 | — |
| 2025/26 | Uefa Champions League | Bayern Munich | 3 | 70 | 0 | 0 | 1673 |
| 2025/26 | Franz Beckenbauer Supercup | Bayern Munich | 1 | 18 | 0 | 0 | 1531 |
| 2024/25 | Uefa Champions League | Bayern Munich | 3 | 103 | 0 | 1 | 1483 |
| 2024/25 | Dfb Pokal | Bayern Munich | 1 | 17 | 0 | 0 | — |
| 2023/24 | Uefa Champions League | Galatasaray | 6 | 540 | 1 | 0 | 1662 |
| 2023/24 | Uefa Champions League Qualifying | Galatasaray | 6 | 540 | 0 | 0 | 1391 |
| 2021/22 | Uefa Europa League Qualifying | Galatasaray | 3 | 270 | 1 | 0 | 1310 |
| 2021/22 | Uefa Europa League | Galatasaray | 3 | 245 | 0 | 0 | 1660 |
| 2019/20 | Uefa Europa League | Stade Rennais FC | 2 | 180 | 0 | 1 | 1576 |
| 2019/20 | Trophee Des Champions | Stade Rennais FC | 1 | 45 | 0 | 0 | 1714 |
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 |
|---|---|---|---|---|
| Bruno Gaspar Liga Portugal · 2019 | 26 | €3.5M | €1.0M | fell |
| David Carmo Liga Portugal · 2024 | 25 | €12.0M | €5.0M | fell |
| Diogo Leite Liga Portugal · 2021 | 22 | €10.0M | €15.0M | rose |
| Cristián Borja Liga Portugal · 2019 | 26 | €3.5M | €3.0M | flat |
| Marcos López Eredivisie · 2023 | 24 | €4.0M | €2.5M | fell |
| Noussair Mazraoui Eredivisie · 2021 | 24 | €17.0M | €28.0M | rose |
| Jeremiah St. Juste Liga Portugal · 2024 | 28 | €8.0M | €3.0M | fell |
| Marco Torsiglieri Premier Liga · 2013 | 25 | €4.0M | €1.5M | fell |
Transfer history
Fees as reported by the source; undisclosed fees shown as unknown, never estimated.
| Date | From | To | Fee | MV at time |
|---|---|---|---|---|
| 30 Jun 2026 | Galatasaray | Bayern Munich | Free / loan | €10.0M |
| 5 Feb 2026 | Bayern Munich | Galatasaray | Free / loan | €15.0M |
| 28 Jan 2024 | Galatasaray | Bayern Munich | €30.0M | €22.0M |
| 26 Jul 2021 | Stade Rennais | Galatasaray | €5.7M | €2.5M |
| 30 Jun 2021 | Dijon | Stade Rennais | Free / loan | €2.5M |
| 5 Oct 2020 | Stade Rennais | Dijon | Free / loan | €1.8M |
| 1 Jul 2019 | Rennes B | Stade Rennais | Unknown | €250k |
| 1 Jan 2018 | Rennes U19 | Rennes B | Unknown | Data unavailable |
| 1 Jul 2017 | Rennes U17 | Rennes U19 | Unknown | Data unavailable |
| 1 Jul 2015 | Rennes Jugend | Rennes U17 | Unknown | Data unavailable |
| 1 Jul 2014 | Red Star Jugend | Rennes Jugend | Free / loan | 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.