Yu In-Soo

In-Soo's current-season form is up 45% on last season (Season 11→16), while his Rating climbed 19→21. His peak season for form remains 2020/21 (Season 40).

Domestic career

Season	Club	Apps	G	Match	RTG	Season
2026/27	Jeju United FC · 5th	21	0	6.68	21	17
2025/26	Jeju United FC · 3rd	35	1	6.77	19	11
2024/25	Gangwon FC · 2nd	28	2	6.7	31	13
2023/24	Gangwon FC · 4th	25	1	6.7	31	9
2023/24	Jeju United FC	9	0	6.7	—	—
2022/23	Seongnam FC	6	1	6.98	—	—
2022/23	Gimcheon Sangmu FC · 3rd	19	2	6.98	37	17

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 6 earlier seasons and 1 youth-team spell in the full career.

Korea Republic · international

Side	Apps	G
Korea Republic U23	1	0

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

Scout report

Experienced headCentral defender

Yu In-Soo is a 31-year-old central defender at Jeju United FC, rated 20.5 overall by Field Insider's model, ranking 65th of 83 on scout potential in the K League 1. A seasoned veteran, he has been a rotation option this season (36.1% of available minutes). His defensive output reads 2.77 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on In-Soo.

Judged on this season alone, In-Soo graded 16 — a workmanlike campaign that ranks 9th of 19 of the 19 centre-backs in the K League 1, on 3 clean sheets and 2.768 defensive actions per 90.

Year-on-year, that's a clear step up on last season (Season 11 → 16). Over the 6 seasons on record his form has drifted down, peaking in 2020/21.

On long-term talent our Rating reads 21, 15th of 19 of the 19 centre-backs in the K League 1. At 31 In-Soo is into the veteran stage, where the age curve weighs on the projection, and a market index of 2.9 reflects that trajectory.

From the career report

Read the full career report →

Below his 2020/21 peak but holding a solid level — the platform for a return is there.

Peak: 2020/21Holding level4 clubs

Current potential15th of 19 centre-backs · K League 1 · 21 apps Current season9th of 19 centre-backs · K League 1 · 21 apps 9th-best centre-back in the K League 1 65th in the K League 1 · potential 15th-highest potential centre-back in the K League 1

20.5

Ratingi

15th of 19 centre-backs

Seasoni

below regular-starter level

36.1%

Minutes

rotation minutes

2.77

Def. actions / 90

moderate defensive volume

Output in context · Jeju United FC finished 5th of 12 · a mid-table side

Apps

2.77

Def. / 90

Tackles

Interceptions

Clean sheets

2.77 tackles, blocks & interceptions per 90 — moderate defensive volume, with 3 clean sheets across 21 appearances.

Watch points

Game time. Only 36.1% of available minutes — needs a settled run to prove the level.
Age curve. At 31, both level and resale value are on the downslope.
Level. Rates below a nailed-on top-tier starter on our model.

Outlook

With a Rating of 20.5, In-Soo carries the 15th-highest potential of the centre-backs in the K League 1 of 19 — though on just 21 appearances this season, so the standing rests on a small sample. Defensively he reads as moderate defensive volume (2.77 tackles, blocks & interceptions per 90). Veteran phase — a short-term, lower-fee proposition as both level and value decline (0.9× and falling).

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

Per 90 & availability

Minutes played %36.1%

Available fixtures25 of 25

Goals / 900

Assists / 900

Goal contribution / 900

Defensive actions / 902.768

Player flow

Goal involvements0

Shot conversion %0

Shot accuracy %100

Pass accuracy %76

Dribble success %25

Cards / 900.443

Foul involvement / 902.768

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 (~7), then tapers with age. At 31, In-Soo sits on 2.9, past its peak and easing. The blue line is In-Soo's projected Rating — 20.5 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 centre-backs in the K League 1 with 600+ minutes this season.

Shooting

Goals0

Shots on target2

Shots2

Passing

Assists0

Chances created10

Passes259

Pass accuracy76%

Possession

Successful dribbles1

Dribble success25%

Duels won43

Duels won %58.1%

Fouls won14

Defending

Tackles14

Interceptions8

Blocks3

Fouls committed11

Yellow/red cards

Yellow cards4

Red cards0

Transfer history

Jeju United FCJan 2025 – now

Gangwon FCJan 2023 – Jan 2025

SSeongnam FC(back from loan)Sept 2022 – Jan 2023

Gimcheon Sangmu FC(on loan)Mar 2021 – Sept 2022

SSeongnam FCJan 2020 – Mar 2021

FC Tokyo(back from loan)Jan 2019 – Jan 2020

Avispa Fukuoka(on loan)Feb 2018 – Jan 2019

FC Tokyountil Feb 2018

About Yu In-Soo

In-Soo Yu is a 31-year-old centre-back who plays for Jeju United FC, born on December 28, 1994, standing 178 cm tall. He is from Korea Republic. Jeju United FC currently sit 5th of 12 in the K League 1.

This season

In the current season, Yu In-Soo has made 21 appearances with 0 goals and 0 assists across 813 minutes, averaging a 6.68 match rating over his last 9 rated games, with 4 yellow cards. Though primarily a centre-back, he has also lined up in midfield this season.

When Yu In-Soo plays, Jeju United FC's record this season is 3W-4D-3L.

Recent matches

July 21, 2026: 1-1 draw at home vs Gangwon FC (90 minutes, 7.2 rating)
July 12, 2026: 0-0 draw at home vs Daejeon Citizen (90 minutes, 6.7 rating)
May 17, 2026: 1-2 loss at home vs FC Anyang (59 minutes, 6.5 rating)
May 9, 2026: 2-1 win at home vs FC Seoul (45 minutes, 6.7 rating)
April 25, 2026: 0-1 loss away at Incheon United (90 minutes, 6.9 rating)
April 18, 2026: 1-1 draw at home vs Gimcheon Sangmu FC (90 minutes, 6.3 rating)
April 11, 2026: 2-0 win away at Pohang Steelers (90 minutes)
April 4, 2026: 1-0 win at home vs Bucheon FC 1995 (90 minutes, 7.2 rating)
March 22, 2026: 1-1 draw away at Gangwon FC (90 minutes, 6 rating)
March 15, 2026: 1-2 loss at home vs FC Seoul (79 minutes, 6.6 rating)

Yu In-Soo's next match is on August 30, 2026, when Jeju United FC face Daejeon Citizen at home in the K League 1.

Field Insider's view

Field Insider currently rates Yu In-Soo at 20.5 with a Season form score of 16, ranking 65th of 83 centre-backs in the K League 1. See the full scout report for strengths, watch-points and the market-value outlook.

His honours include 2 career titles — among them the K League 2. Full list in the career record.

Career

Across 11 recorded seasons, Yu In-Soo has totalled 241 club appearances with 16 goals and 3 assists for 7 different clubs. His busiest campaign came in 2025/26, with 35 appearances for Jeju United FC.

Yu In-Soo's career has also included time at Gangwon FC, SSeongnam FC, Gimcheon Sangmu FC, FC Tokyo and Avispa Fukuoka.

On the international stage, Yu In-Soo has represented Korea Republic U23 — 1 cap in our records.

Transfer news

No transfer news found for this player.

Profile

Season stats

Performance data · by competition

Career

Scout report

Output in context · Jeju United FC finished 5th of 12 · a mid-table side

Watch points