Best U23 Young Left-Backs in the Jupiler Pro League
22 players aged 23 or under · ranked by Analytical Strength Index
Best Young Left-Backs in the Jupiler Pro League (Oct 2026)
22 players tracked across 14 clubs. Updated October 2026.
Ranked by Analytical Strength Index
Use the search bar below to find specific players, or apply filters to narrow results by club, age range, or market value. Click the chart icon next to any player to view their historical value trajectory and forecast.
Player Rankings
Ranked by Analytical Strength Index. Click any player to view full profile, or click the chart icon to see value history.
Joaquin Seys
Club Brugge KV • 21 years old
€17.3M
€20.0M
+15.6%
Expected: €20.3M
73.4
Tuur Rommens
KVC Westerlo • 23 years old
€6.1M
€7.0M
+15.6%
Expected: €6.8M
57.1
Nazinho
Cercle Brugge • 23 years old
€5.2M
€6.0M
+15.6%
Expected: €5.8M
55.2
Yaimar Medina
KRC Genk • 21 years old
€3.5M
€4.0M
+15.6%
Expected: €4.1M
49.4
Moncef Zekri
KV Mechelen • 18 years old
€3.5M
€4.0M
+15.6%
Expected: €4.7M
48.6
Bjorn Meijer
Club Brugge KV • 23 years old
€2.6M
€3.0M
+15.6%
42.8
Gustav Mortensen
Standard Liège • 22 years old
€2.6M
€3.0M
+15.6%
42.5
Valy Konaté
Cercle Brugge • 19 years old
€1.1M
€1.3M
+15.6%
31.0
Dylan Ourega
KVC Westerlo • 22 years old
€865K
€1.0M
+15.6%
28.5
Yannick Cappelle
Zulte Waregem • 23 years old
€562K
€650K
+15.6%
23.4
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Sign up freeJoaquin Seys
Club Brugge KV · 21 years old
73.4
ASI
Current Value
€20.0M
% Change
+15.6%
1yr Forecast Range
€18.0M - €22.6M
Tuur Rommens
KVC Westerlo · 23 years old
57.1
ASI
Current Value
€7.0M
% Change
+15.6%
1yr Forecast Range
€6.1M - €7.5M
Nazinho
Cercle Brugge · 23 years old
55.2
ASI
Current Value
€6.0M
% Change
+15.6%
1yr Forecast Range
€5.2M - €6.4M
Yaimar Medina
KRC Genk · 21 years old
49.4
ASI
Current Value
€4.0M
% Change
+15.6%
1yr Forecast Range
€3.6M - €4.5M
Moncef Zekri
KV Mechelen · 18 years old
48.6
ASI
Current Value
€4.0M
% Change
+15.6%
1yr Forecast Range
€4.1M - €5.2M
Bjorn Meijer
Club Brugge KV · 23 years old
42.8
ASI
Current Value
€3.0M
% Change
+15.6%
1yr Forecast Range
Gustav Mortensen
Standard Liège · 22 years old
42.5
ASI
Current Value
€3.0M
% Change
+15.6%
1yr Forecast Range
Valy Konaté
Cercle Brugge · 19 years old
31.0
ASI
Current Value
€1.3M
% Change
+15.6%
1yr Forecast Range
Dylan Ourega
KVC Westerlo · 22 years old
28.5
ASI
Current Value
€1.0M
% Change
+15.6%
1yr Forecast Range
Yannick Cappelle
Zulte Waregem · 23 years old
23.4
ASI
Current Value
€650K
% Change
+15.6%
1yr Forecast Range
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Sign up freeMarket Overview: Jupiler Pro League Young Left-Backs (updated October 2026)
Our database tracks 22 Jupiler Pro League Young Left-Backs as of October 2026, representing 14 clubs with a combined market value of €53.8M. The average market value for Jupiler Pro League Young Left-Backs is €2.4M, with the average age at 22 years old.
The most valuable young left-back in the Jupiler Pro League is Joaquin Seys, worth €20.0M and playing for Club Brugge KV at 21 years old. The top 5 Young Left-Backs average €8.2M in market value, including Tuur Rommens and Nazinho.
Age distribution shows the youngest tracked young left-back is Moncef Zekri (18 years, KV Mechelen, €4.0M), while the oldest is Tuur Rommens (23 years, KVC Westerlo, €7.0M). Research shows Young Left-Backs typically peak at age 28.
Our 1-year forecast model projects 14 Young Left-Backs (64%) will increase in market value over the next 12 months based on age-curve trajectories, current performance trends, and playing time analysis. The Jupiler Pro League market for Young Left-Backs remains actively developing with emerging talent as of October 2026.
Explore Market Size by Position in Jupiler Pro League
Interactive bubble chart showing predicted 2-year growth vs current age for all Jupiler Pro League Young Left-Backs. Identify undervalued assets and track market momentum across 14 clubs with €53.8M combined value.
Age Distribution: Jupiler Pro League Young Left-Backs
The Jupiler Pro League LB market shows 2 distinct age segments, with the largest cohort in the 21-23 bracket (18 players, 82% of market). The 21-23 age group holds the most value at €47.9M, averaging €2.7M per player.
Top Young Left-Backs by Age Bracket
U21 Years (4 players)
21-23 Years (18 players)
Market Value Distribution
Elite Tier Concentration
The top 3 Young Left-Backs (14% of players) control €33.0M
Market Tiers
Market structure shows distributed value with high (€15-30m) tier representing 5% of the Jupiler Pro League LB pool.
High (€15-30M)
Mid (€5-15M)
Emerging (<€5M)
Club Distribution: Jupiler Pro League Young Left-Backs
Among 14 Jupiler Pro League clubs, Club Brugge KV leads with 2 Young Left-Backs worth €23.0M (averaging €11.5M per player). The top 10 clubs account for 82% of tracked Young Left-Backs.
Club Brugge KV (2 Young Left-Backs)
KVC Westerlo (2 Young Left-Backs)
Cercle Brugge (3 Young Left-Backs)
KRC Genk (2 Young Left-Backs)
Scout Tools
Advanced analytics for scouting and recruitment decisions. Each tool provides unique insights into player value, potential, and market dynamics.
Pre-Peak Value Efficiency (PPVE)
Identifies pre-peak players offering exceptional value relative to their age bracket. Higher PPVE = better value.
Understanding Pre-Peak Value Efficiency (PPVE)
Club Brugge KV's Joaquin Seys at 21 years old has the highest Pre-Peak Value Efficiency at 33.33×. That means Joaquin Seys is valued 33.33× higher than the median player in the 21-23 age bracket-representing exceptional value before reaching peak age.
In second is KVC Westerlo's Tuur Rommens, who is 23 years old, with a 11.67× PPVE. Third is Nazinho of Cercle Brugge, who is 23 years old with a 10.00× PPVE.
How PPVE is calculated: PPVE compares a player's current market value to the median value of all players in their age bracket. A PPVE of 33.33× means the player is worth 3233% more than typical players their age-making them high-value targets before they reach peak value.
PPVE by Age Bracket
| Rank | Player | Age | Bracket | Current Value | Bracket Median | PPVE |
|---|---|---|---|---|---|---|
| #1 | Joaquin Seys Club Brugge KV | 21 | 21-23 | €20.0M | €600K | 33.33x |
| #2 | Tuur Rommens KVC Westerlo | 23 | 21-23 | €7.0M | €600K | 11.67x |
| #3 | Nazinho Cercle Brugge | 23 | 21-23 | €6.0M | €600K | 10.00x |
| #4 | Yaimar Medina KRC Genk | 21 | 21-23 | €4.0M | €600K | 6.67x |
| #5 | Bjorn Meijer Club Brugge KV | 23 | 21-23 | €3.0M | €600K | 5.00x |
| #6 | Gustav Mortensen Standard Liège | 22 | 21-23 | €3.0M | €600K | 5.00x |
| #7 | Moncef Zekri KV Mechelen | 18 | U21 | €4.0M | €1.3M | 3.08x |
| #8 | Dylan Ourega KVC Westerlo | 22 | 21-23 | €1.0M | €600K | 1.67x |
| #9 | Yannick Cappelle Zulte Waregem | 23 | 21-23 | €650K | €600K | 1.08x |
| #10 | Valy Konaté Cercle Brugge | 19 | U21 | €1.3M | €1.3M | 1.00x |
| #11 | Abdoul Ayinde KAA Gent | 21 | 21-23 | €600K | €600K | 1.00x |
| #12 | Nolan Gillot RAAL La Louvière | 23 | 21-23 | €500K | €600K | 0.83x |
| #13 | Lorenzo Youndje KAS Eupen | 21 | 21-23 | €400K | €600K | 0.67x |
| #14 | Alexandro Calut Standard Liège | 23 | 21-23 | €400K | €600K | 0.67x |
| #15 | Christian Akpan KRC Genk | 21 | 21-23 | €350K | €600K | 0.58x |
| #16 | Noah Dodeigne Standard Liège | 23 | 21-23 | €250K | €600K | 0.42x |
| #17 | Arnaud Dony Union Saint-Gilloise | 22 | 21-23 | €200K | €600K | 0.33x |
| #18 | Roméo Monticelli Oud-Heverlee Leuven | 21 | 21-23 | €200K | €600K | 0.33x |
| #19 | Beni Mpanzu Cercle Brugge | 22 | 21-23 | €200K | €600K | 0.33x |
| #20 | Yassine Ben Hamed Royal Antwerp FC | 23 | 21-23 | €150K | €600K | 0.25x |
Return-to-Peak Potential (RPP)
Recovery potential from current value to forecasted peak. Shows how much upside remains for players approaching their prime.
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Upgrade to FanRisk-Adjusted Upside (RAU)
Upside potential weighted against forecast uncertainty. Higher RAU = better risk-reward profile.
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Upgrade to FanRoster Pressure Index (RPI)
Squad depth pressure based on Z-score distribution. Negative RPI = thin depth, positive = deep roster.
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Upgrade to FanAge-Share Concentration (ASC)
Identifies players capturing disproportionate value relative to age group representation. Positive ASC = value concentration.
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Upgrade to FanBuy-Now vs Wait-List Map
Categorizes players by age position and upside potential to guide timing of acquisition.
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Upgrade to FanPrice vs Peer Z-Score
IQR-based pricing analysis relative to position peers. Identifies over/undervalued players vs market.
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How We Rank Jupiler Pro League Young Left-Backs
Our Analytical Strength Index is calibrated specifically for young left-backs, using position-specific age curves and playing time benchmarks. The model draws from academic research on player valuation (Franck & Nüesch, 2012) and age-performance curves (Dendir, 2016).
Scoring Components for LB
Historical Achievement Index (35%)
Peak career market value for Jupiler Pro League young left-backs, reflecting proven track record and reputation. Uses log-scale to account for exponential value distribution at elite level.
Current Performance Proxy (30%)
Present market value for Jupiler Pro League young left-backs, capturing recent form, injuries, and current performance level. Weighted to reflect age-related depreciation patterns.
Playing Time Utilization (18%)
Defenders with 2,500+ minutes score highest, indicating regular starting role and sustained performance.
Age-Adjusted Performance Curve (12%)
Defenders peak at 28 with 5.0%/year decline rate. Pre-peak players score higher on development trajectory.
Competition Level Adjustment (3%)
Jupiler Pro League competition level factored into comparative strength assessment.
Performance Expectations Multiplier (2%)
Players at clubs with Champions League pedigree face higher performance standards and tactical complexity, contributing to development and market validation.
LB Performance Benchmarks
Peak Age: 28 years (balance of physicality and tactical intelligence)
Decline Rate: Widening steps, not a flat rate: about -5% at 29, -10% at 30, steeper from 31 (positioning offsets pace loss)
Optimal Minutes: 2,500 per season (regular starter with rotation management)
1-Year Market Value Forecast
Probabilistic model combining age-curve depreciation, value momentum, and playing time factors:
• Age Factor: Compounding and banded around a peak of 28: +25%/year through age 21, +15% at 22-23, +10% up to the year before peak, then -5%, -10% and steeper with each later band. Growth is damped above €30M.
• Value Trajectory: Near career peak (>95% of peak value): +3% momentum | Moderate decline: -5%
• Playing Time Factor: Regular starters (+2%), Squad rotation (-2%)
• Forecast Range: ±10% confidence interval
Research Foundation
• Dendir (2016): Age-performance curves for young left-backs
• Carmichael et al. (2011): Player depreciation in top leagues
• Franck & Nüesch (2012): Hedonic pricing models for talent valuation
• Szymanski, S. (2015). Money and Soccer: A Soccernomics Guide
Frequently Asked Questions
Common questions about Jupiler Pro League Young Left-Backs, updated October 2026
Who are the most valuable Young Left-Backs in the Jupiler Pro League right now?
The most valuable young left-back in the Jupiler Pro League today is Joaquin Seys, who is worth €20.0M and plays for Club Brugge KV. The second most valuable is Tuur Rommens (€7.0M, KVC Westerlo), followed by Nazinho (€6.0M, Cercle Brugge). Our database tracks 22 Jupiler Pro League Young Left-Backs with comprehensive market valuations updated in October 2026.
How are Jupiler Pro League Young Left-Backs ranked?
Jupiler Pro League Young Left-Backs are ranked by our proprietary Analytical Strength Index, which is specifically calibrated for Young Left-Backs. The score combines six factors: Historical Achievement Index (35%) measuring peak career value, Current Performance Proxy (30%) reflecting recent market signals, Playing Time Utilization (18%) tracking minutes played, Age-Adjusted Performance Curve (12%) using position-specific peak ages, League Quality Coefficient (3%) for Jupiler Pro League competition level, and Club Tier Multiplier (2%) accounting for club prestige. This methodology is grounded in academic research including work by Dendir (2016) on age-performance curves and Franck & Nüesch (2012) on hedonic pricing models.
What age do Young Left-Backs peak?
Defenders typically peak at age 28. In our valuation model, value then falls in widening steps rather than at a flat annual rate: around -5% at 29, -10% at 30, and -25% or more from 31. Research shows defenders balance physical attributes with tactical intelligence, allowing them to maintain high performance through their late 20s. The optimal playing time for peak performance is around 2,500 minutes per season.
How much does it cost to sign a top young left-back from the Jupiler Pro League?
Transfer fees for Jupiler Pro League Young Left-Backs vary significantly based on market value, contract length, and club bargaining position. For the top-ranked young left-back Joaquin Seys (market value: €20.0M), estimated transfer fees would range from €16.0M to €28.0M depending on contract situation. Players with longer contracts (3+ years) command premium fees (1.2-1.4× market value), while those in the final year may be available for 0.8-1.1× market value. Our fee estimates are derived from historical transfer patterns and contract-clock modifiers validated against actual Jupiler Pro League transactions.
What is the value forecast for Jupiler Pro League Young Left-Backs?
Our 1-year forecast model projects market value changes for Jupiler Pro League Young Left-Backs based on age-curve depreciation, historical trajectory, and playing time adjustments. The forecast combines three factors: age-based appreciation/depreciation (pre-peak players compound gains toward their position's peak age, up to +25% a year through age 21 and easing as they approach it, while post-peak players fall in widening steps), market trajectory momentum (comparing current to peak value), and playing time confidence (regular starters receive +2% boost). Forecast confidence intervals account for position-specific volatility-defenders have ±10% volatility. Young players (under 22) and older players (over 32) receive 1.15× uncertainty multipliers due to unpredictable development or decline patterns.
Where does the Jupiler Pro League young left-back data come from?
Our Jupiler Pro League young left-back data is sourced from Football Analytics AI's proprietary Transfer Intelligence Database, which aggregates market valuations, player statistics, contract information, and transfer histories from multiple industry sources. Market values are updated regularly based on player performance, injuries, contract negotiations, and transfer market activity. We enhance this data with our proprietary analytics including position-specific scoring algorithms, age-performance curves calibrated to academic research, and statistical forecast models. All data is validated against official Jupiler Pro League sources and updated monthly (last update October 2026) to ensure accuracy for recruitment and investment decisions.