Future Stars | Player Intelligence Report

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The Gdańsk Tower

Who Is Kacper Potulski?

Mainz 05’s Polish Centre-Back Prospect

Kacper Potulski is an 18-year-old Polish centre-back whose 1.95-metre frame, aerial presence and rapid rise into Mainz 05’s senior side have made him one of the Bundesliga’s most compelling young defenders.

PositionCentre-Back
NationalityPoland
ClubMainz 05
Age18

Kacper Potulski portrait in Mainz 05 colours

01

Verified Facts

Kacper Potulski Player Snapshot

Full NameKacper Potulski
Date of Birth19 October 2007
BirthplaceGdańsk, Poland
Current Club1. FSV Mainz 05
PositionCentre-Back
Squad Number48
Height / Foot1.95 m / Right

TMJ Player TypeAerial Defensive Anchor

TMJ editorial classification

02

Verified Facts

Kacper Potulski Market Overview

Market Value€18 million

Transfermarkt, May 2026

Contract Until30 June 2028

Mainz Since2023

Joined the academy from Legia Warsaw

Weekly WageNot publicly reported
AgencySports360 GmbH
Data note: Market value is an external Transfermarkt estimate rather than an official asking price. No wage figure has been invented.
03

Verified Facts

Kacper Potulski Career At A Glance

Career Stage Team Verified Record Milestone Source
Youth Development Lechia Gdańsk / Legia Warsaw Developed in Poland from 2015 to 2023 Moved to Germany at 15 Transfermarkt / Mainz 05
Mainz Academy Mainz U17 / U19 / U23 Joined in 2023 Progressed into senior training Mainz 05
Professional Debut Mainz 05 UEFA Conference League, 2025 Started in a winning European debut Mainz 05
Senior Breakthrough Mainz 05 13 Bundesliga appearances, 1 goal in 2025/26 Scored against Bayern Munich Bundesliga / public records
Poland Pathway Poland U21 / Senior Team U21 involvement and first senior call-up in 2026 Reached the senior environment at 18 UEFA / Mainz 05
Potulski’s trajectory accelerated sharply in 2025/26, moving from academy and U23 football into Bundesliga, European and senior international contention.
04

TMJ Analysis

Kacper Potulski Scouting Report

Kacper Potulski in match action for Mainz 05
Kacper Potulski in match action for Mainz 05.

Playing StylePhysical Defensive Anchor

Potulski uses his frame to protect central zones, contest direct play and give the back line a powerful reference point.

Preferred AreasCentral Defence

His profile is most natural in the centre of a back three or back four, where he can attack aerial balls and defend the box.

On The BallSecure First-Phase Passing

His European passing sample suggests comfort circulating possession, although progressive range remains an area to keep measuring.

Off The BallAerial Control And Box Defence

Height, reach and timing make him valuable against crosses, set pieces and direct forward play.

Signature TraitDominant Defensive Presence

The combination of unusual size for his age and increasing senior composure gives him a clear identity.

TMJ view: Potulski is not interesting merely because he is 1.95 metres tall. His breakthrough matters because the physical profile is already surviving senior Bundesliga and European football.
05

TMJ Analysis

Kacper Potulski TMJ Trait Assessment

Aerial PresencePrimary Strength

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TMJ analysis

Box DefendingStrong

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TMJ analysis

Physical DuelsStrong

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TMJ analysis

Build-Up PassingPromising

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TMJ analysis

Bundesliga ReadinessEstablished Prospect

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TMJ analysis

Method: These dots are qualitative TMJ assessments, not official game ratings. They reflect public information, available match data and his current senior sample.
06

Future Projection

Why He Matters

Rare Physical ProfileElite Size At 18

A 1.95-metre centre-back with senior mobility and composure is a valuable developmental foundation.

Mainz PathwayDevelopment Became Opportunity

Mainz trusted him through academy, U23, European and Bundesliga football rather than freezing his progress.

Senior EvidenceMore Than Youth Reputation

He has already defended in the Bundesliga and Europe, reducing the uncertainty around many teenage centre-backs.

Poland PotentialA Future Defensive Reference

His first senior call-up at 18 points toward a potential long-term role in Poland’s defensive succession.

07

Trait-Based Comparison

Similar Players

Dean Huijsen similar player reference

Dean Huijsen

Spain

Shared trait: exceptional height combined with comfort entering senior football young.

Jarrad Branthwaite similar player reference

Jarrad Branthwaite

England

Shared trait: large defensive frame, aerial range and penalty-area authority.

António Silva similar player reference

António Silva

Portugal

Shared trait: early responsibility in central defence and composure beyond his age.

These are stylistic reference points only. They do not imply that Potulski has reached the same level or follows an identical developmental path.
08

Future Projection

Kacper Potulski Development & Projection

Development AreaDefending Space Behind

The next test is maintaining control when Mainz defend higher and he must turn, recover and protect larger spaces.

Short-Term ProjectionRegular Bundesliga Rotation

His immediate pathway should involve sustained senior minutes without removing the competitive protection of rotation.

Long-Term CeilingTop-Level Bundesliga Centre-Back

If his anticipation, recovery defending and passing range continue to develop, he has the structure to anchor a high-level defence.

09

Editorial Conclusion

TMJ Scout Verdict

Prospect LevelHigh-Potential Prospect

An unusual physical profile supported by meaningful senior evidence.

Main StrengthAerial And Box Authority

His size becomes valuable because he uses it to influence real defensive situations.

Main QuestionCan He Control Bigger Spaces?

His ceiling will depend on mobility, recovery decisions and distribution against faster, more aggressive opponents.

TMJ verdict: Kacper Potulski already looks like more than an academy curiosity. Mainz have moved him through their pathway quickly, and he has answered with senior appearances in the Bundesliga and Europe, a goal against Bayern Munich and recognition from Poland. His height and aerial presence provide the obvious headline, but the more important detail is that he is learning to use those tools inside demanding senior matches. The next stage is refining his work in open space and expanding his build-up influence. With regular minutes and careful development, Potulski has the foundation to become a commanding Bundesliga centre-back and a long-term option for Poland.
10

Transparency

Sources & Data Policy

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