Lee Si-Young

Following his move to Suwon City FC, Si-Young's current-season form is up 500% on last season (Season 1→6), while his Rating eased 35→27. His peak season for form remains 2021/22 (Season 20).

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2025/26	Suwon City FC · 3rd	18	0	0	6.75	27	6
2025/26	FC Seoul	1	0	0	—	—	—
2024/25	Suwon Bluewings	31	1	0	—	—	—
2023/24	FC Seoul · 1st	8	0	0	6.8	35	1
2022/23	Seongnam FC · 3rd	30	0	2	6.73	46	11
2021/22	Seongnam FC · 3rd	23	0	1	6.83	45	20

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 depthFull-back

Lee Si-Young is a 29-year-old full-back at Suwon City FC, rated 26.6 overall by Field Insider's model, ranking 76th of 148 on scout potential in the K League 1. An experienced operator, he has been a fringe squad member this season (29.9% of available minutes). His defensive output reads 2.09 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Si-Young.

Judged on this season alone, Si-Young graded 6 — a workmanlike campaign that ranks 22nd of 23 of the 23 full-backs in the K League 1, on 2 clean sheets and 2.093 defensive actions per 90.

Year-on-year, that's a clear step up on last season (Season 1 → 6). Over the 4 seasons on record his form has drifted down, peaking in 2021/22.

On long-term talent our Rating reads 27, top 40% of the 23 full-backs in the K League 1. At 29 Si-Young is in his prime years, and a market index of 3.6 reflects that trajectory.

From the career report

Read the full career report →

Below his 2021/22 peak but holding a solid level — the platform for a return is there.

Peak: 2021/22Holding level

Current potentialTop 40% full-backs · K League 1 Current season22nd of 23 full-backs · K League 122nd-best full-back in the K League 176th in the K League 1 · potential9th-highest potential full-back in the K League 1

26.6

Ratingi

9th of 23 full-backs

6.3

Seasoni

below regular-starter level

29.9%

Minutes

limited game time

2.09

Def. actions / 90

moderate defensive volume

Output in context · Suwon City FC finished 3rd of 6 · a mid-table side

2.09

Def. / 90

Tackles

Interceptions

Clean sheets

2.09 tackles, blocks & interceptions per 90 — moderate defensive volume, with 2 clean sheets across 19 appearances.

Watch points

Game time. Only 29.9% 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 26.6, Si-Young carries the 9th-highest potential of the full-backs in the K League 1 (top 40%). Defensively he reads as moderate defensive volume (2.09 tackles, blocks & interceptions per 90). Experienced and reliable, but the value curve is easing (1.1× now → 0.8× projected in three years).

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

Per 90 & availability

Minutes played %29.9%

Available fixtures40 of 40

Goals / 900

Assists / 900

Goal contribution / 900

Defensive actions / 902.093

Player flow

Goal involvements0

Shot conversion %0

Shot accuracy %75

Dribble success %50

Cards / 900.251

Foul involvement / 901.507

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 29, Si-Young sits on 3.6, past its peak and easing. The blue line is Si-Young's projected Rating — 26.6 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.