Eredivisie

Maas Willemsen

Maas Willemsen, 23, from Netherlands ➤ SC Heerenveen, since 2025 ➤ Centre-Back ➤ Market value: €4.50m ➤ * 29/04/2003 in Zutphen, Netherlands

HeerenveenDefender - Centre-Back23 years€4.50m
Maas Willemsen

Info

Biographical card, current club and contract facts. Empty fields mean the source did not publish that value.

Position
Defender - Centre-Back
Shirt
#3
Age
23
Date of birth
29/04/2003
Height
1,90m
Foot
left
Citizenship
Netherlands
Joined
01/07/2025
Contract until
30/06/2029
Market value
€4.50m
Career fees
0
Youth clubs
SV Harfsen, FC Twente (-2014), De Graafschap (2014-2020)

Statistics

Career totals from Transfermarkt: this season, then by competition and by club. Minutes and cards appear when the source recorded them.

This season

SeasonCompetitionAppsMinGAYCRC
26/27Eredivisie54500000

By competition

CompetitionAppsGA
Eredivisie3510
Keuken Kampioen Divisie3322
U21 Div. 1 Fall3250
U21 Div. 1 Spring2040
KNVB Beker700
U21 Div. 2 Fall700
U21 Div. 2 Spring500
Keuken Kampioen Play-Offs200
U19 Cup Netherlands200
Play-Offs Conference League100
U18 Div. 2 Spring000

By club

ClubAppsGA
Graafschap U216490
Heerenveen4010
De Graafschap3822
Graafschap U18200

Transfers

Recorded moves between clubs, with fee and market value on the day of the deal when the source has them.

DateSeasonFromToFeeMarket value
01/07/202525/26De GraafschapHeerenveenfree transfer€500k
01/07/202222/23Graafschap U21De Graafschap--
01/07/202020/21Graafschap U17Graafschap U21--
01/07/201919/20Graafschap Yth.Graafschap U17--
01/07/201414/15FC Twente YouthGraafschap Yth.free transfer-

National

Senior and youth national-team spells: caps, goals, shirt number and whether the player is still in the current pool.

No national-team career rows for this player.

Market value

Current and peak Transfermarkt valuations, plus the history of changes by club and age. Rankings are relative to the current squad, league and position group.

Current
€4.50m
Highest
€4.50m · 28/05/2026
Last change
28/05/2026
Centre-Back 460Eredivisie 81Heerenveen 5Netherlands 99Worldwide 2.576Year 2003 257
DateAgeClubValue
12/10/202219De Graafschap Doetinchem€25k
04/07/202320De Graafschap Doetinchem€25k
08/01/202420De Graafschap Doetinchem€25k
10/06/202421De Graafschap Doetinchem€125k
10/12/202421De Graafschap Doetinchem€125k
14/03/202521De Graafschap Doetinchem€200k
09/06/202522De Graafschap Doetinchem€500k
02/12/202522SC Heerenveen€1.50m
28/05/202623SC Heerenveen€4.50m

xG Statistics

Maas Willemsen is not yet matched to an Understat player model, so there are no xG rows. When the mapping appears, this block will show appearances, minutes, goals, xG, npxG, assists, xA, shots, key passes and xGChain for each available season.

Understat has no season rows for this player yet.

What the columns mean

Read this table as chance quality, not as a scoreboard. A player can outscore xG (finishing well) or lag behind it (missed sitters). Compare rows only when minutes are in the same range.

Apps · Appearances
Matches in which the player was used in this league season, including substitute minutes.
Min · Minutes
Total minutes on the pitch. Useful when comparing output: 1 goal in 90 minutes is not the same as 1 goal in 800.
G · Goals
Goals credited to the player in the Understat shot model for that season.
xG · Expected goals
The quality of shots the player took, expressed as the number of goals an average finisher would score from the same chances. A 0.30 xG shot is a chance that goes in about 3 times in 10.
npxG · Non-penalty xG
Expected goals with penalties removed. This is the cleaner read of open-play and set-piece finishing, because a penalty is usually ~0.76 xG by itself.
A · Assists
Goals that followed the player's last pass. Actual assists, not the model.
xA · Expected assists
The xG value of shots that came directly from the player's key passes. High xA with few assists usually means teammates missed good chances.
Sh · Shots
Total shots recorded by Understat, including blocked and off-target attempts.
KP · Key passes
Passes that led to a shot. This is the volume behind xA.
xGChain · xG chain
Team xG from possessions the player touched. It captures involvement in build-up, not only the shot or the last pass. A midfielder who starts attacks can rank high here without scoring.
xGBuildup · xG buildup
The same possession xG, but excluding the shot-taker and the assist. This is the purest 'how much did this player help create the chance before the final ball' number.
NPG · Non-penalty goals
Goals scored from open play or set pieces, excluding penalties.

Teammates