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Marvin Keller

Switzerland · the desk

Goalkeeper, Switzerland

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

    23

    sourced with the squad

  • position

    Goalkeeper

    Switzerland

  • our board

    #1228

    of 1424 rated players

  • folded so far

    43′

    1 appearance

  • transfer market value (EUR millions), as a rank among peers

    6.00

    91th percentile of peers

Sourced

squad
Switzerland · Goalkeeperfootball-data.org · 2026-06-29

Sourced context, nothing more. It never touches a call.

Our rating · the working

the board →

1558 ±76

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

1560 full roster Elo (+2 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 ~1572 ±78 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 Switzerland's strengththe fair club-over-national anchor, every player's starting point
1558
age curve at 23 (goalkeepers' curve)measured from the open archive by our own study (defenders: the published literature's shape), never fitted to our calls
-30
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
1558
form: national-team results, 1 appearance43 minutes, weighted by margin, surprise and his match stats, but shared across the XI
+2
full roster Elo · with results
1560

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 2026-05-31. 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

    #1228 of 1424 rated players on our board.

What he’d cost · our estimate

We don’t price him yet. Our fee model leans on the level he plays at, and no trusted source has given us his club’s strength. We’d rather show nothing than a number we don’t trust.

The fee record · sourced

  • 2024-07-01FC Winterthur → BSC Young Boysundisclosed
  • 2023-09-13BSC Young Boys → FC Winterthurloan
  • 2023-02-14FC WIL 1900 → BSC Young Boysundisclosed
  • 2021-07-01Grasshoppers → FC WIL 1900undisclosed

Reported moves, dated and attributed (api-football.com), news facts, not a valuation site’s estimates. It never touches a call.

In our coverage · Switzerland’s record

  • v Canada2–1Missed it
  • v Bosnia & Herzegovina4–1Called it
  • at Qatar1–1Missed it

The newsroom’s calls on Switzerland. Team-level, never dressed up as a player stat.

Squad · sourced