Kim Ryun-Seong

Following his move to Jeju United FC, Ryun-Seong's current-season form is up 0% on last season (Season 0→13), while his Rating climbed 38→46. That makes this his strongest season for form to date.

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2026/27	Jeju United FC	18	1	0	6.86	—	—
2025/26	Jeju United FC · 3rd	36	0	2	6.89	46	13
2024/25	Pohang Steelers · 6th	4	0	0	—	38	0
2024/25	Busan I ParkLoan	11	0	0	—	—	—
2023/24	Pohang Steelers	1	0	0	—	—	—
2023/24	Gimcheon Sangmu FC	10	0	0	—	—	—
2022/23	Gimcheon Sangmu FCLoan · 3rd	4	0	0	6.55	43	5

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

Korea Republic · international

Side	Apps	G
Korea Republic U17	5	0

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

Scout report

Squad depthFull-back

Kim Ryun-Seong is a 24-year-old full-back at Jeju United FC, rated 45.6 overall by Field Insider's model, ranking 5th of 148 on scout potential in the K League 1. An emerging talent, he has been a rotation option this season (35.4% of available minutes). His defensive output reads 2.4 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Ryun-Seong.

Judged on this season alone, Ryun-Seong graded 13 — a workmanlike campaign that ranks 12th of 23 of the 23 full-backs in the K League 1, on 4 clean sheets and 2.4 defensive actions per 90.

Year-on-year, that's a clear step up on last season (Season 0 → 13). Across the 4 seasons we hold, it's his best return yet.

On long-term talent our Rating reads 46, top 5% of the 23 full-backs in the K League 1. At 24 Ryun-Seong is in his prime years, and a market index of 11.2 reflects that trajectory.

From the career report

Read the full career report →

Ryun-Seong is operating at his career peak — the 2025/26 level is the level.

Peak: 2025/26Holding level

Current potentialTop 5% full-backs · K League 1 Current season12th of 23 full-backs · K League 112th-best full-back in the K League 15th in the K League 1 · potential1st-highest potential full-back in the K League 1

45.6

Ratingi

1st of 23 full-backs

12.6

Seasoni

below regular-starter level

35.4%

Minutes

rotation minutes

2.4

Def. actions / 90

moderate defensive volume

Output in context · Jeju United FC finished 3rd of 6 · a mid-table side

2.4

Def. / 90

Tackles

Interceptions

Clean sheets

2.4 tackles, blocks & interceptions per 90 — moderate defensive volume, with 4 clean sheets across 36 appearances. Going forward he chipped in 0 goals and 2 assists — a useful bonus from the back.

Watch points

Game time. Only 35.4% of available minutes — needs a settled run to prove the level.
Level. Rates below a nailed-on top-tier starter on our model.

Outlook

With a Rating of 45.6, Ryun-Seong carries the 1st-highest potential of the full-backs in the K League 1 (top 5%). Defensively he reads as moderate defensive volume (2.4 tackles, blocks & interceptions per 90). Approaching peak years; value is still building (price multiplier 2×) with the best seasons likely ahead.

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

Per 90 & availability

Minutes played %35.4%

Available fixtures40 of 40

Goals / 900

Assists / 900.141

Goal contribution / 900.141

Defensive actions / 902.4

Player flow

Goal involvements2

Shot conversion %0

Shot accuracy %40

Dribble success %45.2

Cards / 900.424

Foul involvement / 902.188

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 (~11), then tapers with age. At 24, Ryun-Seong sits on 11.2, at or near its peak. The blue line is Ryun-Seong's projected Rating — 45.6 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 target2

Shots5

Passing

Assists2

Possession

Successful dribbles14

Dribble success45.2%

Fouls won18

Defending

Tackles17

Interceptions11

Blocks6

Fouls committed13

Yellow/red cards

Yellow cards6

Red cards0

Transfer history

Jeju United FC2024/25 – now

Pohang Steelers(back from loan)2024/25 – 2024/25

Busan I Park(on loan)2024/25 – 2024/25

Pohang Steelers(back from loan)2023/24 – 2024/25

Gimcheon Sangmu FC(on loan)2022/23 – 2023/24

Pohang Steelersuntil 2022/23

About Kim Ryun-Seong

Ryun-Seong Kim is a 24-year-old full-back who plays for Jeju United FC, born on June 4, 2002, standing 175 cm tall. He is from Korea Republic. Jeju United FC currently sit 3rd of 6 in the K League 1.

This season

In the current season, Kim Ryun-Seong has made 36 appearances with 0 goals and 2 assists across 1,275 minutes, averaging a 6.84 match rating over his last 10 rated games, with 6 yellow cards. Though primarily a full-back, he has also lined up in midfield this season.

When Kim Ryun-Seong plays, Jeju United FC's record this season is 4W-2D-10L — and his match ratings average 7.01 at home against 6.74 on the road.

Recent matches

November 8, 2025: 1-2 loss at home vs FC Anyang (90 minutes, 1 assist, 7.9 rating)
October 25, 2025: 2-1 win away at Suwon City FC (90 minutes, 6.9 rating)
October 18, 2025: 1-3 loss away at Daejeon Citizen (90 minutes, 6.7 rating)
October 3, 2025: 1-1 draw at home vs Jeonbuk Motors (89 minutes, 7.3 rating)
September 28, 2025: 3-4 loss at home vs Suwon City FC (90 minutes, 6.3 rating)
September 21, 2025: 0-1 loss away at Pohang Steelers (90 minutes, 6.7 rating)
September 14, 2025: 1-2 loss away at FC Anyang (72 minutes, 6.5 rating)
August 15, 2025: 0-0 draw at home vs Gangwon FC (89 minutes, 6.9 rating)
August 9, 2025: 0-1 loss away at Ulsan Hyundai FC (64 minutes, 7 rating)
July 26, 2025: 1-3 loss away at Gimcheon Sangmu FC (45 minutes, 6.2 rating)

Field Insider's view

Field Insider currently rates Kim Ryun-Seong at 45.6 with a Season form score of 12.6, ranking 5th of 148 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 6 recorded seasons, Kim Ryun-Seong has totalled 97 club appearances with 1 goal and 2 assists for 4 different clubs. His busiest campaign came in 2025/26, with 36 appearances for Jeju United FC.

Kim Ryun-Seong's career has also included time at Pohang Steelers, Busan I Park and Gimcheon Sangmu FC.

On the international stage, Kim Ryun-Seong has represented Korea Republic U17 — 5 caps 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 3rd of 6 · a mid-table side

Watch points