Seong-Ung's current-season form is up 375% on last season (Season 4→19), while his Rating eased 38→32. That makes this his strongest season for form to date.

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2026/27	Jeonbuk Motors	10	0	0	6.7	—	—
2025/26	Jeonbuk Motors	4	0	0	6.9	—	—
2025/26	Gimcheon Sangmu FC · 3rd	18	1	2	7.17	32	19
2024/25	Gimcheon Sangmu FC · 3rd	11	1	0	6.5	38	4
2024/25	Jeonbuk Motors	7	0	0	6.5	—	—
2023/24	Jeonbuk Motors · 3rd	11	0	1	6.64	40	5
2022/23	Jeonbuk Motors · 2nd	17	0	2	6.76	46	15

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 3 earlier seasons in the full career.

Korea Republic · international

Side	Apps	G
Korea Republic U23	3	0

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

Scout report

Squad depthCentral midfielder

Maeng Seong-Ung is a 28-year-old central midfielder at Gimcheon Sangmu FC, rated 32.4 overall by Field Insider's model, ranking 48th of 148 on scout potential in the K League 1. An experienced operator, he has been a rotation option this season (35.4% of available minutes). His defensive output reads 3.65 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Seong-Ung.

Judged on this season alone, Seong-Ung graded 19 — a strong campaign that ranks top 17% of the 48 central midfielders in the K League 1, on 1 goal, 2 assists and 3.648 defensive actions per 90.

Year-on-year, that's a clear step up on last season (Season 4 → 19). Across the 4 seasons we hold, it's his best return yet.

On long-term talent our Rating reads 32, top 32% of the 48 central midfielders in the K League 1. At 28 Seong-Ung is in his prime years, and a market index of 4.8 reflects that trajectory.

From the career report

Read the full career report →

A career still climbing — Seong-Ung is at his peak right now, and the curve hasn't flattened.

Peak: 2025/26Trending upRemarkably consistent

Current potentialTop 32% central midfielders · K League 1 Current seasonTop 17% central midfielders · K League 18th-best central midfielder in the K League 148th in the K League 1 · potential15th-highest potential central midfielder in the K League 1

32.4

Ratingi

15th of 48 central midfielders

18.6

Seasoni

below regular-starter level

35.4%

Minutes

rotation minutes

3.65

Def. actions / 90

solid defensive volume

Output in context · Gimcheon Sangmu FC finished 3rd of 6 · a mid-table side

3.65

Def. / 90

Tackles

Interceptions

Clean sheets

3.65 tackles, blocks & interceptions per 90 — solid defensive volume, with 4 clean sheets across 22 appearances. Going forward he chipped in 1 goal and 2 assists — a useful bonus from the back.

Strengths

Attacking threat. Chips in from deep: 0.22 goal involvements per 90, useful for a central midfielder.
Defensive volume. 3.65 tackles, blocks & interceptions per 90 — does the unseen work.

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 32.4, Seong-Ung carries the 15th-highest potential of the central midfielders in the K League 1 (top 32%). Defensively he reads as solid defensive volume (3.65 tackles, blocks & interceptions per 90). Experienced and reliable, but the value curve is easing (1.2× now → 0.9× projected in three years).

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

Per 90 & availability

Minutes played %35.4%

Available fixtures38 of 38

Goals / 900.074

Assists / 900.149

Goal contribution / 900.223

Defensive actions / 903.648

Player flow

Goal involvements3

Shot conversion %33.3

Shot accuracy %33.3

Pass accuracy %41

Dribble success %58.3

Cards / 900.298

Foul involvement / 903.201

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 (~8), then tapers with age. At 28, Seong-Ung sits on 4.8, past its peak and easing. The blue line is Seong-Ung's projected Rating — 32.4 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.