Billy Gilmour

25 yrs · Defensive midfielder (also CM) · Scotland
SSC Napoli · Serie A · Foot: right · Height: 170 cm
Risk: ModerateConfidence: LowSample: LowDevelopment: ModerateContract: until 30 Jun 2029
Market value
€20.0M
Updated today
Estimated acquisition
€14.0M – €25.8M
Estimated · 20–80% range
Model value
€12.4M – €30.0M
Performance-implied · estimated
Projected (24m)
€8.9M – €25.2M
Resale range · estimated
Potential value gap
-€13.4M – €16.0M
Model value − acquisition

Value picture

Where the market, the likely price and the model estimates sit.

Estimated acquisition€14.0M – €25.8M
Model value (performance-implied)€12.4M – €30.0M
Projected value (24 months)€8.9M – €25.2M
Dashed line: current market value (€20.0M). Bars are 20–80% model ranges; tick = median.

The model rates Billy Gilmour's performance-implied value at EUR 12.4M-30.0M, above the estimated acquisition range of EUR 14.0M-25.8M. Its 24-month market value projection is EUR 8.9M-25.2M. Context-adjusted goal contributions are 0.73x the positional average in the league (802 minutes, league coefficient 0.93). Confidence is low: no event-level data (xG, progressive actions) is available from the current free source, and injury history is unavailable.

Bargain Index: not assigned

What drives the score. Not a black box: each component and its level.

Insufficient sample (< 900 league minutes)

PerformanceHigh87.2th pct among MID peers (age-neutral)
AgeNeutral25.1 years
Acquisition costNeutralest. €19.2M vs market €20.0M
Expected appreciationLow-15% over ~2 years (model)
Value gapSmallweak predictor on its own
DevelopmentModerate
League translationBig-five leagueleague coefficient 0.93
Tactical fitNot evaluatedRequires event/role data not available from the current free source.
RiskModerate
Data confidenceLow

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.

Highest recorded: €20.0M

Profile vs positional peers

Percentiles among 1164 evaluated MID players with 900+ minutes.

Performance (last season, league)

Minutes
802 (24% of available)
Goals + assists / 90
0.11
Context-adjusted G+A / 90
0.09
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
0.93 (rank 4)
Team strength (Elo)
1618
Opponent strength
1448
Possession, role
Data unavailable

League strength 1.00 = average club of the big-five leagues. Elo includes continental matches.

Potential

Development
Moderate
Trajectory
stable
Breakout probability
Age > 23
Resale range (24m)
€8.9M – €25.2M

Historical comparables (8): median 2-year value change -36% (IQR -70% to -24%).

Risk profile

Overall: Moderate

  • ▲Small sample: 802 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.

SeasonClubLeaguePosAppsMinMin shareGAG+A/90Adj. G+A/90Opp. EloTeam EloLeague str.
2025/26SSC NapoliSerie ADM1780223%100.110.09144816180.93
2024/25SSC NapoliSerie ADM26117434%010.080.07149416600.99
2024/25Brighton & Hove AlbionPremier LeagueDM2983%000.000.13158816141.23
2023/24Brighton & Hove AlbionPremier LeagueDM30212662%010.040.05155815201.14
2022/23Brighton & Hove AlbionPremier LeagueDM1450715%010.180.15165016191.23
2021/22Norwich CityPremier LeagueCM24185854%010.050.18159612751.17
2020/21Chelsea FCPremier LeagueDM52598%000.000.07166217351.19
2019/20Chelsea FCPremier LeagueCM61926%000.000.15156616531.14

Cups & continental competitions

SeasonCompetitionClubAppsMinGAAvg opp. Elo
2025/26Uefa Champions LeagueSSC Napoli385001651
2024/25Italy CupSSC Napoli218000—
2023/24Uefa Europa LeagueBrighton & Hove Albion8600001532
2023/24Fa CupBrighton & Hove Albion217401—
2022/23Fa CupBrighton & Hove Albion12300—
2021/22Fa CupNorwich City210101—
2020/21Fa CupChelsea FC434200—
2020/21Uefa Champions LeagueChelsea FC295001431
2019/20Fa CupChelsea FC315700—

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)AgeValue then~2y laterOutcome
Amadou Diawara
Serie A · 2021
24€14.0M€2.2Mfell
Rafinha
Serie A · 2018
25€28.0M€9.5Mfell
Eljif Elmas
Serie A · 2024
25€20.0M€13.0Mfell
Xherdan Shaqiri
Serie A · 2015
24€17.0M€15.0Mflat
Renato Sanches
Ligue 1 · 2023
26€15.0M€3.0Mfell
Jens Cajuste
Serie A · 2024
25€10.0M€8.0Mfell
Nicolò Zaniolo
Premier League · 2024
25€20.0M€15.0Mfell
Carles Pérez
Serie A · 2021
23€8.0M€5.0Mfell

Transfer history

Fees as reported by the source; undisclosed fees shown as unknown, never estimated.

DateFromToFeeMV at time
30 Aug 2024BrightonNapoli€14.8M€18.0M
1 Sept 2022ChelseaBrighton€8.3M€12.0M
31 May 2022NorwichChelseaFree / loan€12.0M
2 Jul 2021ChelseaNorwichFree / loan€10.0M
11 Feb 2020Chelsea U23ChelseaUnknown€3.0M
1 Jul 2018Chelsea U18Chelsea U23UnknownData unavailable
1 Jul 2017Rangers FC U17Chelsea U18€1.7MData 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.