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.

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

Assists0

Possession

Successful dribbles6

Dribble success50%

Fouls won9

Defending

Tackles11

Interceptions10

Blocks4

Fouls committed9

Yellow/red cards

Yellow cards3

Red cards0

Transfer history

Suwon City FC2025/26 – now

FC Seoul(back from loan)2024/25 – 2025/26

Suwon Bluewings(on loan)2023/24 – 2024/25

FC Seoul2022/23 – 2023/24

Seongnam FC(back from loan)2020/21 – 2022/23

SSeoul E-Land FC(on loan)until 2020/21

Gwangju FC(on loan)2018/19 – 2020/21

Seongnam FCuntil 2018/19

About Lee Si-Young

Si-Young Lee is a 29-year-old full-back who plays for Suwon City FC, born on April 21, 1997, standing 173 cm tall. He is from Korea Republic. Suwon City FC currently sit 3rd of 6 in the K League 1.

This season

In the current season, Lee Si-Young has made 19 appearances with 0 goals and 0 assists across 1,075 minutes, averaging a 6.86 match rating over his last 10 rated games, with 3 yellow cards. His season has spanned the FA Cup and the K League 1. Though primarily a full-back, he has also lined up in midfield this season.

When Lee Si-Young plays, Suwon City FC's record this season is 6W-2D-6L — and his match ratings average 6.86 at home against 6.62 on the road.

Recent matches

December 8, 2025: 2-3 loss at home vs Bucheon FC 1995 (90 minutes, 6.9 rating)
November 22, 2025: 1-0 win away at FC Anyang (90 minutes, 7 rating)
November 9, 2025: 0-1 loss away at Ulsan Hyundai FC (90 minutes, 6.9 rating)
November 2, 2025: 1-1 draw at home vs Daegu FC (27 minutes, 6.5 rating)
October 25, 2025: 1-2 loss at home vs Jeju United FC (90 minutes, 6.7 rating)
October 18, 2025: 0-2 loss away at Jeonbuk Motors (78 minutes, 6.7 rating)
October 5, 2025: 1-1 draw at home vs FC Seoul (89 minutes, 7.3 rating)
September 28, 2025: 4-3 win away at Jeju United FC (90 minutes, 6.9 rating)
September 21, 2025: 1-0 win at home vs Gangwon FC (90 minutes, 7 rating)
September 14, 2025: 2-4 loss at home vs Gwangju FC (79 minutes, 6.7 rating)

Field Insider's view

Field Insider currently rates Lee Si-Young at 26.6 with a Season form score of 6.3, ranking 76th 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 4 career titles — among them the K League 2 and the Asian Games. Full list in the career record.

Career

Across 8 recorded seasons, Lee Si-Young has totalled 139 club appearances with 1 goal and 3 assists for 6 different clubs. His busiest campaign came in 2024/25, with 31 appearances for Suwon Bluewings.

Lee Si-Young's career has also included time at FC Seoul, Suwon Bluewings, Seongnam FC, SSeoul E-Land FC and Gwangju FC.

On the international stage, Lee Si-Young has represented Korea Republic U23 — 3 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 · Suwon City FC finished 3rd of 6 · a mid-table side

Watch points