Yu In-Soo

In-Soo's current-season form is up 109% on last season (Season 11→23), while his Rating climbed 19→22. His peak season for form remains 2020/21 (Season 40).

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2026/27	Jeju United FC · 3rd	26	0	1	5.74	21	15
2025/26	Jeju United FC · 3rd	35	1	0	6.77	19	11
2024/25	Gangwon FC · 2nd	28	2	0	6.7	31	13
2023/24	Gangwon FC · 4th	25	1	0	6.7	31	9
2022/23	Seongnam FC	6	1	0	6.98	—	—
2022/23	Gimcheon Sangmu FC · 3rd	19	2	0	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 headFull-back

Yu In-Soo is a 31-year-old full-back at Jeju United FC, enjoying a standout season — 0 goals and 1 assists in 26 appearances, a Season grade of 23, top 32% of K League 1 full-backs. On long-term scout potential he's rated 21.8, ranking 100th of 137 in the K League 1. A seasoned veteran, he has been a rotation option (42.9% of available minutes). His defensive output reads 2.88 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 23 — a solid campaign that ranks top 32% of the 25 full-backs in the K League 1, on 5 clean sheets and 2.878 defensive actions per 90.

Year-on-year, that's a clear step up on last season (Season 11 → 23). Over the 6 seasons on record his form has drifted down, peaking in 2020/21.

On long-term talent our Rating reads 22, 20th of 25 of the 25 full-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 4 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 potential20th of 25 full-backs · K League 1 Current seasonTop 32% full-backs · K League 1 8th-best full-back in the K League 1 100th in the K League 1 · potential 20th-highest potential full-back in the K League 1

21.8

Ratingi

20th of 25 full-backs

22.5

Seasoni

below regular-starter level

42.9%

Minutes

rotation minutes

2.88

Def. actions / 90

moderate defensive volume

Output in context · Jeju United FC finished 4th of 12 · an upper-table side

Apps

2.88

Def. / 90

Tackles

Interceptions

Clean sheets

2.88 tackles, blocks & interceptions per 90 — moderate defensive volume, with 5 clean sheets across 26 appearances. Behind an upper-table side (4th of 12) the side controls more games, so the defensive load is lighter — the value sits as much in composure and ball progression as in raw volume. Going forward he chipped in 0 goals and 1 assist — a useful bonus from the back.

Watch points

Game time. Only 42.9% 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 21.8, In-Soo carries the 20th-highest potential of the full-backs in the K League 1 of 25. Defensively he reads as moderate defensive volume (2.88 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 %42.9%

Available fixtures30 of 30

Goals / 900

Assists / 900.078

Goal contribution / 900.078

Defensive actions / 902.878

Player flow

Goal involvements1

Shot conversion %0

Shot accuracy %75

Pass accuracy %79

Dribble success %50

Cards / 900.311

Foul involvement / 902.645

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 (~9), then tapers with age. At 31, In-Soo sits on 4, past its peak and easing. The blue line is In-Soo's projected Rating — 21.8 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 K League 1 with 600+ minutes this season.

Shooting

Goals0

Shots on target3

Shots4

Passing

Assists1

Chances created14

Passes376

Pass accuracy79%

Possession

Successful dribbles4

Dribble success50%

Duels won65

Duels won %60.2%

Fouls won20

Defending

Tackles22

Interceptions11

Blocks4

Fouls committed14

Yellow/red cards

Yellow cards4

Red cards0

Transfer history

Jeju United FCJan 2025 – now

Gangwon FCuntil Jan 2025

SSeongnam FC(back from loan)Sept 2022 – Jan 2025

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 full-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 3rd of 12 in the K League 1.

This season

In the current season, Yu In-Soo has made 26 appearances with 0 goals and 1 assist across 1,157 minutes, averaging a 5.34 match rating over his last 10 rated games, with 4 yellow cards. Though primarily a full-back, he has also lined up in midfield this season.

When Yu In-Soo plays, Jeju United FC's record this season is 5W-6D-3L — and his match ratings average 5.9 at home against 5.2 on the road.

Recent matches

September 20, 2026: 1-0 win away at Gangwon FC (90 minutes, 0 rating)
September 12, 2026: 2-2 draw away at Bucheon FC 1995 (90 minutes, 6.1 rating)
September 9, 2026: 1-0 win away at Gwangju FC (32 minutes, 7 rating)
September 5, 2026: 0-0 draw at home vs Ulsan Hyundai FC (19 minutes, 0 rating)
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)

Yu In-Soo's next match is on October 10, 2026, when Jeju United FC face FC Seoul away in the K League 1.

Field Insider's view

Field Insider currently rates Yu In-Soo at 21.8 with a Season form score of 22.5, ranking 100th of 137 full-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 237 club appearances with 16 goals and 4 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 4th of 12 · an upper-table side

Watch points