
Sean Longstaff
Value picture
Where the market, the likely price and the model estimates sit.
The model rates Sean Longstaff's performance-implied value at EUR 11.3M-16.8M, above the estimated acquisition range of EUR 6.1M-15.5M. Its 24-month market value projection is EUR 4.7M-11.3M. Context-adjusted goal contributions are 1.84x the positional average in the league (1006 minutes, league coefficient 1.30). Confidence is medium: no event-level data (xG, progressive actions) is available from the current free source, and injury history is unavailable.
Bargain Index: 13
What drives the score. Not a black box: each component and its level.
| Performance | High | 86.7th pct among MID peers (age-neutral) |
| Age | Unfavorable | 28.7 years |
| Acquisition cost | Favorable | est. €10.1M vs market €15.0M |
| Expected appreciation | Very low | -53% over ~2 years (model) |
| Value gap | Large | weak predictor on its own |
| Development | Low | |
| League translation | Big-five league | league coefficient 1.3 |
| 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 1163 evaluated MID players with 900+ minutes.
Performance (last season, league)
- Minutes
- 1006 (29% of available)
- Goals + assists / 90
- 0.36
- Context-adjusted G+A / 90
- 0.40
- xG, xA, progression
- Data unavailable
- Defensive actions
- Data unavailable
- Performance percentile
- 87 (High)
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
- 1.30 (rank 1)
- Team strength (Elo)
- 1521
- Opponent strength
- 1573
- 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)
- €4.7M – €11.3M
Trajectory drivers: changed club; team strength down (-132 Elo); relative output up 321% vs positional peers.
Historical comparables (8): median 2-year value change -38% (IQR -55% to +13%).
Risk profile
Overall: Moderate
- ⚠Limited sample: 1006 league minutes last season.
- ⚠Played under 40% of available league minutes (injury data unavailable, cause unknown).
- ⓘ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).
Already playing in a big-five league.
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 | Leeds United | Premier League | CM | 23 | 1006 | 29% | 2 | 2 | 0.36 | 0.40 | 1573 | 1521 | 1.30 |
| 2024/25 | Newcastle United | Premier League | CM | 25 | 787 | 23% | 0 | 0 | 0.00 | 0.09 | 1535 | 1653 | 1.23 |
| 2023/24 | Newcastle United | Premier League | CM | 35 | 2747 | 80% | 6 | 2 | 0.26 | 0.19 | 1558 | 1610 | 1.14 |
| 2022/23 | Newcastle United | Premier League | CM | 33 | 2516 | 74% | 1 | 4 | 0.18 | 0.16 | 1561 | 1678 | 1.23 |
| 2021/22 | Newcastle United | Premier League | CM | 24 | 1460 | 43% | 1 | 1 | 0.12 | 0.19 | 1588 | 1545 | 1.17 |
| 2020/21 | Newcastle United | Premier League | CM | 22 | 1408 | 41% | 0 | 1 | 0.06 | 0.15 | 1530 | 1500 | 1.19 |
| 2019/20 | Newcastle United | Premier League | CM | 23 | 1373 | 40% | 1 | 1 | 0.13 | 0.22 | 1616 | 1476 | 1.14 |
| 2018/19 | Newcastle United | Premier League | DM | 8 | 670 | 20% | 1 | 1 | 0.27 | 0.22 | 1570 | 1532 | 1.22 |
| 2018/19 | Liverpool FC | Premier League | DM | 1 | 17 | 0% | 0 | 0 | 0.00 | 0.05 | 1454 | 1916 | 1.22 |
| 2016/17 | Kilmarnock FC | Scottish Premiership | CM | 16 | 1344 | 39% | 3 | 0 | 0.20 | 0.23 | 1270 | 1200 | 0.48 |
Cups & continental competitions
| Season | Competition | Club | Apps | Min | G | A | Avg opp. Elo |
|---|---|---|---|---|---|---|---|
| 2025/26 | Fa Cup | Leeds United | 4 | 211 | 1 | 0 | — |
| 2024/25 | Fa Cup | Newcastle United | 2 | 180 | 0 | 1 | — |
| 2023/24 | Fa Cup | Newcastle United | 4 | 362 | 1 | 0 | — |
| 2023/24 | Uefa Champions League | Newcastle United | 5 | 354 | 1 | 0 | 1676 |
| 2022/23 | Fa Cup | Newcastle United | 1 | 60 | 0 | 0 | — |
| 2021/22 | Fa Cup | Newcastle United | 1 | 60 | 0 | 0 | — |
| 2020/21 | Fa Cup | Newcastle United | 1 | 120 | 0 | 0 | — |
| 2019/20 | Fa Cup | Newcastle United | 6 | 567 | 1 | 1 | — |
| 2018/19 | Fa Cup | Newcastle United | 3 | 290 | 1 | 0 | — |
| 2016/17 | Scottish Fa Cup | Kilmarnock FC | 1 | 90 | 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 |
|---|---|---|---|---|
| William Carvalho Laliga · 2021 | 29 | €15.0M | €14.0M | flat |
| Jesse Lingard Premier League · 2021 | 29 | €22.0M | €8.0M | fell |
| Christian Eriksen Premier League · 2022 | 30 | €20.0M | €8.0M | fell |
| Emanuele Giaccherini Premier League · 2014 | 29 | €8.5M | €4.0M | fell |
| Giovani Lo Celso Premier League · 2024 | 28 | €16.0M | €8.0M | fell |
| Tomáš Souček Premier League · 2020 | 25 | €12.0M | €45.0M | rose |
| Romain Saïss Premier League · 2019 | 29 | €5.0M | €10.0M | rose |
| Jeffrey Schlupp Premier League · 2021 | 29 | €9.0M | €7.0M | fell |
Transfer history
Fees as reported by the source; undisclosed fees shown as unknown, never estimated.
| Date | From | To | Fee | MV at time |
|---|---|---|---|---|
| 18 Jul 2025 | Newcastle | Leeds | €13.8M | €20.0M |
| 1 Jan 2019 | Newcastle U23 | Newcastle | Unknown | €150k |
| 31 May 2018 | Blackpool | Newcastle U23 | Free / loan | €150k |
| 21 Jul 2017 | Newcastle U23 | Blackpool | Free / loan | €75k |
| 31 May 2017 | Kilmarnock FC | Newcastle U23 | Free / loan | €75k |
| 9 Jan 2017 | Newcastle U23 | Kilmarnock FC | Free / loan | Data unavailable |
| 1 Jul 2015 | Newcastle U18 | Newcastle U21 | 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.