Mark Flekken
Goalkeeper, Netherlands
Club football at Bayer 04 Leverkusen.
Sourced facts, dated and on the record. Squad membership, and his club when a source names one. Nothing invented; we don’t make players up.
At a glance
age
32
sourced with the squad
position
Goalkeeper
Netherlands
club
Bayer 04 Leverkusen
football-data.org
club tier
1804
ClubElo strength
our board
#181
of 1424 rated players
folded so far
2513′
29 appearances
transfer market value (EUR millions), as a rank among peers
6.00
91th percentile of peers
Sourced
- squad
- Netherlands · Goalkeeperfootball-data.org · 2026-06-29
- club
- Bayer 04 Leverkusenfootball-data.org · 2026-06-29
Sourced context, nothing more. It never touches a call.
Our rating · the working
the board →1903 ±45
his quality rating: club, age and measured output. The board orders by this plus his World Cup form, less a discount for how much we can measure him.
How the number is builtopenclose
1943 full roster Elo (+40 from national-team results)
the ± is how settled the number is, more minutes, tighter band
Tier 2, lineups + results, how rich the evidence is, not just how much
potential ~1943 ±45 a projection, not a measurement: room left on the goalkeeper age curve
Where he starts (his team’s strength, we refuse to invent what we haven’t measured) plus two fixed nudges make the quality rating above; the last line is what national-team results have added since, taking it to his full roster Elo.
- starts at Netherlands's strengththe fair club-over-national anchor, every player's starting point
- 1873
- age curve at 32 (goalkeepers' curve)young-side discount halved, his measured production overrides the average-youngster prior
- 0
- transfer market value, a sourced market-consensus quality prior (the stronger reading for him here)his percentile among minutes-qualified peers, from club seasons
- +30
- quality rating · club, age + measured output
- 1903
- form: national-team results, 29 appearances2513 minutes, weighted by margin, surprise and his match stats, but shared across the XI
- +40
- full roster Elo · with results
- 1943
Where the +30 skill term comes from
Not a reputation, a measurement. We score every shot in the data ourselves and rank him among minutes-qualified peers; a fixed arithmetic turns that rank into points.
- measured
- 6.00 transfer market value (EUR millions), as a rank among peers
- his rank
- 91th percentile of qualified peers
- scored from
- the CC0 Transfermarkt community mirror; a market-consensus quality prior, taken at a capped weight where it reads a player higher than our (fixed, partial) shot/event data can
- the arithmetic
- 46 pts/σ × z(90.5th) = 46 × 1.31 × 0.5 (position weight) = +30
A forward-only shadow signal, as of 2026-06-08. The skill term comes from our own xG models over the open archive; the rest is earned, recorded per appearance, auditable, never back-filled. It never moves a live call.
The notebook
The lines a beat writer keeps, except every one of ours is read off the ledger above, auditable to the night. Nothing invented.
standing
#181 of 1424 rated players on our board.
vs his seed
The folded nights have added +40 to the number he seeded with, he has outplayed his own prior.
workload
He barely leaves the pitch: 87′ a night across 29 folded appearances.
What he’d cost · our estimate
€3.6m–€14m ≈ €7.1m
Not a figure from any valuation site; we don’t republish those. Our own model: the level he plays at, what we’ve measured of him, his age and his role. A band, not a point: we can’t see contract length or release clauses, the two biggest real drivers, so we say so.
The workingopenclose
- reference feea mid-tier-club, peak-age forward of average measured skill
- €8m
- club tier 1804the level he plays at, the strongest signal of what a club pays
- ×2.77
- ageage 32, past the fee-peak, value falls ~18% a year
- ×0.67
- goalkeeper fee factorstrikers set the market's top; midfield runs close; defence and goal at the record books' discounts
- ×0.43
- individual skillmeasured 65th percentile of peers
- ×1.13
- our estimate
- ≈ €7.1m
fee-model v3 priors (panel-anchored, 2026-06), calibrated against our reported fees. The band is roughly two-in-three likely; contract length and release clauses are data we don’t hold. Context only, it never touches a call.
The fee record · sourced
The market’s last public word: €13m (2023-07). Our estimate today: ≈ €7.1m. The gap is evidence, many of them, together, recalibrate our model; no single one rewrites him.
our read: richly priced , we rate him 45% below his last market price (a gem signal, context only)
- 2025-06-03Brentford → Bayer Leverkusenundisclosed
- 2023-07-01SC Freiburg → Brentford€13m
- 2018-07-01MSV Duisburg → SC Freiburg€0.8m
- 2016-07-01SpVgg Greuther Fürth → MSV Duisburgundisclosed
Reported moves, dated and attributed (api-football.com), news facts, not a valuation site’s estimates. It never touches a call.
In our coverage · Netherlands’s record
- v MoroccoSealed
- at Tunisia1–3Called it
- v Sweden5–1Called it
- v Japan2–2Missed it
The newsroom’s calls on Netherlands. Team-level, never dressed up as a player stat.
Squad · sourced
- Bart Verbruggen
- Brian Brobbey
- Cody Gakpo
- Crysencio Summerville
- Denzel Dumfries
- Donyell Malen
- Frenkie de Jong
- Guus Til
- Jan Paul van Hecke
- Jorrel Hato
- Jurrien Timber
- Justin Kluivert
- Marten de Roon
- Mats Wieffer
- Memphis Depay
- Mickey van de Ven
- Nathan Aké
- Noa Lang
- Quinten Timber
- Robin Roefs
- Ryan Gravenberch
- Teun Koopmeiners
- Tijjani Reijnders
- Virgil van Dijk
- Wout Weghorst