Sai van Wermeskerken

Wermeskerken's current-season form is up 61% on last season (Season 18→29), while his Rating eased 28→24. That makes this his strongest season for form to date.

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2025/26	Kawasaki Frontale · 8th	26	0	4	6.85	24	29
2024/25	Kawasaki Frontale · 8th	24	1	2	7	28	18
2023/24	Kawasaki Frontale	13	1	0	6.89	—	—
2023/24	NEC Nijmegen · 6th	3	0	0	6.43	32	2
2022/23	Cambuur · 17th	24	1	0	6.71	44	26
2021/22	PEC Zwolle · 18th	7	0	0	6.43	41	4

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 7 earlier seasons in the full career.

Japan · international

Side	Apps	G
Japan U23	4	0

Career caps & goals — tournament breakdown in the full career.

Scout report

Experienced headFull-back

S. van Wermeskerken is a 32-year-old full-back at Kawasaki Frontale, enjoying a standout season — 0 goals and 4 assists in 26 appearances, a Season grade of 29. On long-term scout potential he's rated 28.2. A seasoned veteran, he has been an ever-present (90% of available minutes). His defensive output reads 2.95 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Wermeskerken.

On the season, Wermeskerken graded 29 for current form (age-blind), on 5 clean sheets and 2.95 defensive actions per 90.

Year-on-year, that's a clear step up on last season (Season 18 → 29). Across the 6 seasons we hold, it's his best return yet.

On long-term talent our Rating reads 28. At 32 Wermeskerken is into the veteran stage, where the age curve weighs on the projection, and a market index of 5.1 reflects that trajectory.

From the career report

Read the full career report →

Wermeskerken is operating at his career peak — the 2025/26 level is the level.

Peak: 2025/26Holding levelRemarkably consistent4 clubs

28.2

Ratingi

below regular-starter level

Seasoni

below regular-starter level

90%

Minutes

near ever-present

2.95

Def. actions / 90

moderate defensive volume

Output in context · Kawasaki Frontale finished 7th of 20 · a mid-table side

Apps

2.95

Def. / 90

Tackles

Interceptions

Clean sheets

2.95 tackles, blocks & interceptions per 90 — moderate defensive volume, with 5 clean sheets across 26 appearances. Going forward he chipped in 0 goals and 4 assists — a useful bonus from the back.

Strengths

Availability. On the pitch for 90% of available minutes — a dependable presence in the XI.
Attacking threat. Chips in from deep: 0.17 goal involvements per 90, useful for a full-back.

Watch points

Age curve. At 32, both level and resale value are on the downslope.
Level. Rates below a nailed-on top-tier starter on our model.

Outlook

Rated 28.2 overall — below regular-starter level. Defensively he reads as moderate defensive volume (2.95 tackles, blocks & interceptions per 90), with a bit more on the ball than most in the role. Veteran phase — a short-term, lower-fee proposition as both level and value decline (0.8× and falling).

Generated from Field Insider's rating model · AI-written analysis to follow.

Per 90 & availability

Minutes played %90%

Available fixtures26 of 10

Goals / 900

Assists / 900.171

Goal contribution / 900.171

Defensive actions / 902.95

Player flow

Goal involvements4

Shot conversion %0

Shot accuracy %12.5

Dribble success %60.9

Cards / 900.086

Foul involvement / 901.71

Season-by-season progression

Rating (potential)Season (form)

Value & potential by age

Market valueRating

Solid = now · dashed = projected

The gold line is market value — an index (not €) blending rating, age and league. It climbs through the early 20s, peaks around ages 23–27 (~13), then tapers with age. At 32, Wermeskerken sits on 5.1, past its peak and easing. The blue line is Wermeskerken's projected Rating — 28.2 today — recomputed at each age, so it follows the same rise-and-fall as a career matures and declines. Solid = up to today; dashed = projected.

Season statistics

Bars = where he ranks among full-backs in the J1 League with 600+ minutes this season.

Shooting

Goals0

Shots on target2

Shots16

Passing

Assists4

Chances created21

Passes1,101

Possession

Successful dribbles14

Dribble success60.9%

Duels won84

Duels won %49.7%

Fouls won15

Defending

Tackles44

Interceptions19

Blocks6

Fouls committed25

Yellow/red cards

Yellow cards2

Red cards0

Transfer history

RRatchaburiJul 2026 – nowFree

Kawasaki Frontaleuntil Jul 2026

RRatchaburiJan 2026 – Jul 2026Free

Kawasaki Frontaleuntil Jan 2026

Free agentJan 2026 – Jan 2026Free

Kawasaki FrontaleJan 2024 – Jan 2026Free

NEC Nijmegenuntil Jan 2024

CambuurAug 2022 – Jan 2024

PEC ZwolleJul 2019 – Aug 2022Free

CambuurAug 2017 – Jul 2019

Dordrechtuntil Aug 2017

About S. van Wermeskerken

Sai van Wermeskerken is a 32-year-old full-back who plays for Kawasaki Frontale, born on June 28, 1994 in Maastricht, standing 178 cm tall. He is from Japan. Kawasaki Frontale currently sit 7th of 20 in the J1 League.

This season

In the current season, S. van Wermeskerken has made 26 appearances with 0 goals and 4 assists across 2,105 minutes, with 2 yellow cards.

S. van Wermeskerken's next match is on November 1, 2026, when Kawasaki Frontale face Yokohama F. Marinos away in the J1 League.

Field Insider's view

Field Insider currently rates S. van Wermeskerken at 28.2 with a Season form score of 29. See the full scout report for strengths, watch-points and the market-value outlook.

His honours include 2 career titles — among them the Super Cup. Full list in the career record.

Career

Across 12 recorded seasons, S. van Wermeskerken has totalled 267 club appearances with 5 goals and 11 assists for 5 different clubs. His busiest campaign came in 2018/19, with 38 appearances for Cambuur.

S. van Wermeskerken's career has also included time at RRatchaburi, NEC Nijmegen, Cambuur, PEC Zwolle and Dordrecht.

On the international stage, S. van Wermeskerken has represented Japan U23 — 4 caps in our records.

Transfer news

No transfer news found for this player.

Profile

Season stats

Career

Scout report

Output in context · Kawasaki Frontale finished 7th of 20 · a mid-table side

Strengths

Watch points