Siem de Jong
37 yrs · Attacking midfielder (also ST) · Netherlands
SC Heerenveen · Eredivisie · Foot: right · Height: 185 cm
Contract: until 30 Jun 2023
No model evaluation for this player. MoneyballAI evaluates players with at least 450 league minutes last season in leagues where match-level player data is available from the current free source (14 European top divisions). Market value and transfer history are still shown below.
Market value
€275k
Updated today
Estimated acquisition
—
Estimated · 20–80% range
Model value
—
Performance-implied · estimated
Projected (24m)
—
Resale range · estimated
Potential value gap
—
Model value − acquisition
Market value history
Market value ≠ transfer fee ≠ acquisition cost.
Highest recorded: €10.0M
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. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021/22 | SC Heerenveen | Eredivisie | AM | 27 | 1389 | 45% | 0 | 1 | 0.06 | 0.24 | 1345 | 1287 | 0.60 |
| 2020/21 | SC Heerenveen | Eredivisie | AM | 19 | 1368 | 45% | 4 | 2 | 0.39 | 0.41 | 1374 | 1271 | 0.56 |
| 2019/20 | Ajax Amsterdam | Eredivisie | AM | 4 | 107 | 5% | 0 | 0 | 0.00 | 0.15 | 1345 | 1680 | 0.62 |
| 2017/18 | Ajax Amsterdam | Eredivisie | AM | 21 | 556 | 18% | 4 | 1 | 0.81 | 0.32 | 1321 | 1627 | 0.59 |
| 2016/17 | PSV Eindhoven | Eredivisie | AM | 19 | 961 | 31% | 6 | 1 | 0.66 | 0.27 | 1308 | 1609 | 0.54 |
| 2015/16 | Newcastle United | Premier League | AM | 18 | 446 | 13% | 0 | 1 | 0.20 | 0.41 | 1526 | 1435 | 1.08 |
| 2014/15 | Newcastle United | Premier League | AM | 4 | 148 | 4% | 1 | 0 | 0.61 | 0.50 | 1452 | 1404 | 1.06 |
| 2013/14 | Ajax Amsterdam | Eredivisie | ST | 19 | 1239 | 40% | 7 | 2 | 0.65 | 0.39 | 1341 | 1551 | 0.59 |
| 2012/13 | Ajax Amsterdam | Eredivisie | AM | 34 | 3018 | 99% | 12 | 8 | 0.60 | 0.42 | 1353 | 1544 | 0.54 |
Cups & continental competitions
| Season | Competition | Club | Apps | Min | G | A | Avg opp. Elo |
|---|---|---|---|---|---|---|---|
| 2021/22 | Knvb Beker | SC Heerenveen | 3 | 95 | 1 | 0 | — |
| 2020/21 | Knvb Beker | SC Heerenveen | 3 | 250 | 2 | 0 | — |
| 2019/20 | Knvb Beker | Ajax Amsterdam | 1 | 75 | 3 | 0 | — |
| 2019/20 | Uefa Champions League | Ajax Amsterdam | 4 | 9 | 0 | 0 | 1570 |
| 2017/18 | Knvb Beker | Ajax Amsterdam | 3 | 230 | 3 | 3 | — |
| 2016/17 | Uefa Champions League | PSV Eindhoven | 3 | 135 | 0 | 0 | 1756 |
| 2016/17 | Knvb Beker | PSV Eindhoven | 1 | 63 | 0 | 0 | — |
| 2015/16 | Fa Cup | Newcastle United | 1 | 8 | 0 | 0 | — |
| 2013/14 | Uefa Champions League | Ajax Amsterdam | 4 | 329 | 0 | 0 | 1611 |
| 2013/14 | Uefa Europa League | Ajax Amsterdam | 2 | 153 | 0 | 0 | 1635 |
| 2013/14 | Knvb Beker | Ajax Amsterdam | 2 | 153 | 1 | 0 | — |
| 2013/14 | Johan Cruijff Schaal | Ajax Amsterdam | 1 | 90 | 1 | 0 | 1315 |
| 2012/13 | Uefa Champions League | Ajax Amsterdam | 6 | 540 | 3 | 0 | 1628 |
| 2012/13 | Knvb Beker | Ajax Amsterdam | 3 | 260 | 1 | 1 | — |
| 2012/13 | Uefa Europa League | Ajax Amsterdam | 2 | 210 | 0 | 1 | 1495 |
| 2012/13 | Johan Cruijff Schaal | Ajax Amsterdam | 1 | 90 | 0 | 0 | 1496 |
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.
No comparables computed for this player.
Transfer history
Fees as reported by the source; undisclosed fees shown as unknown, never estimated.
| Date | From | To | Fee | MV at time |
|---|---|---|---|---|
| No transfers recorded. | ||||
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.