Julian Baas

24 yrs · Central midfielder (also DM) · Netherlands
Sparta Rotterdam · Eredivisie · Foot: right · Height: 184 cm
Risk: HighConfidence: MediumSample: MediumDevelopment: LowContract: until 30 Jun 2027
Market value
€700k
Updated 7 days ago
Estimated acquisition
€176k – €582k
Estimated · 20–80% range
Model value
€410k – €649k
Performance-implied · estimated
Projected (24m)
€391k – €1.0M
Resale range · estimated
Potential value gap
-€172k – €473k
Model value − acquisition

Value picture

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

Estimated acquisition€176k – €582k
Model value (performance-implied)€410k – €649k
Projected value (24 months)€391k – €1.0M
Dashed line: current market value (€700k). Bars are 20–80% model ranges; tick = median.

The model rates Julian Baas's performance-implied value at EUR 0.4M-0.6M, above the estimated acquisition range of EUR 0.2M-0.6M. Its 24-month market value projection is EUR 0.4M-1.0M. Context-adjusted goal contributions are 0.31x the positional average in the league (1297 minutes, league coefficient 0.43). Confidence is medium: no event-level data (xG, progressive actions) is available from the current free source, and injury history is unavailable.

Acquisition note: Final year of contract: selling club's leverage is reduced.

Bargain Index: 97

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

PerformanceBelow average12th pct among MID peers (age-neutral)
AgeNeutral24.2 years
Acquisition costVery favorableest. €235k vs market €700k
Expected appreciationNeutral-4% over ~2 years (model)
Value gapVery largeweak predictor on its own
DevelopmentLow
League translationUncertainleague coefficient 0.43
Tactical fitNot evaluatedRequires event/role data not available from the current free source.
RiskHigh
Data confidenceMedium

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: €1.3M

Profile vs positional peers

Percentiles among 1163 evaluated MID players with 900+ minutes.

Performance (last season, league)

Minutes
1297 (42% of available)
Goals + assists / 90
0.00
Context-adjusted G+A / 90
0.04
xG, xA, progression
Data unavailable
Defensive actions
Data unavailable
Performance percentile
12 (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)
1213
Opponent strength
1270
Possession, role
Data unavailable

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

Potential

Development
Low
Trajectory
declining
Breakout probability
Age > 23
Resale range (24m)
€391k – €1.0M

Trajectory drivers: team strength down (-87 Elo); relative output down 76% vs positional peers.

Historical comparables (8): median 2-year value change -19% (IQR -31% to +15%).

Risk profile

Overall: High

  • ⚠Limited sample: 1297 league minutes last season.
  • ⚠League level coefficient 0.43 (1.00 = big-five average): output may not translate.
  • ⚠No continental-competition minutes last season.
  • ⚠Contract ends in 12 months: cheaper, but competition and wage demands likely.
  • ⚠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
53 (MID)
Relative output kept
76%–148%
Held a regular role (900+ min)
68%
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.

SeasonClubLeaguePosAppsMinMin shareGAG+A/90Adj. G+A/90Opp. EloTeam EloLeague str.
2025/26Sparta RotterdamEredivisieDM23129742%000.000.04127012130.43
2024/25Sparta RotterdamEredivisieDM1385128%020.210.16135013000.50
2023/24Excelsior RotterdamEredivisieDM33288894%220.120.14135911420.48
2022/23Excelsior RotterdamEredivisieCM33245980%350.290.33135111970.58

Cups & continental competitions

SeasonCompetitionClubAppsMinGAAvg opp. Elo
2025/26Knvb BekerSparta Rotterdam218000—
2024/25Knvb BekerSparta Rotterdam219900—
2023/24Knvb BekerExcelsior Rotterdam333010—
2022/23Knvb BekerExcelsior Rotterdam215200—

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
Demetri Mitchell
Scottish Premiership · 2019
22€400k€300kfell
Anouar El Azzouzi
Eredivisie · 2024
23€650k€650kflat
Jens Jakob Thomasen
Superliga · 2020
24€400k€700krose
Arnaud Djoum
Eredivisie · 2014
25€600k€500kflat
Yuji Ono
Jupiler Pro League · 2016
24€700k€550kfell
Isaac Sackey
Super Lig · 2022
28€1.2M€450kfell
Ufuk Akyol
Super Lig · 2023
26€1.2M€650kfell
Silas Gnaka
Jupiler Pro League · 2022
24€500k€900krose

Transfer history

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

DateFromToFeeMV at time
30 Jun 2025E. BraunschweigSparta R.Free / loan€800k
29 Jan 2025Sparta R.E. BraunschweigFree / loan€1.0M
1 Jul 2024ExcelsiorSparta R.Free / loan€1.3M
1 Jul 2020Excelsior U19ExcelsiorUnknownData unavailable
1 Jul 2019Excelsior U17Excelsior U19UnknownData 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.