Best full-backs in K League 1

The highest-potential full-backs in K League 1, ranked on Field Insider.

At a glance

Kim Ryun-Seong of Jeju United FC is the standout for raw talent across full-backs in K League 1, with a Field Insider Rating of 45.6, and Song Jun-Seok has been the form player this season, grading 24.6, and Park Soo-Il leads the scoring with 2 goals.

The numbers a scout watches are the year-on-year jumps: Song Jun-Seok has improved his Season rating most, up +17.2 on last season, while Jo Seong-Kwon's scouting Rating has risen fastest, +3.6 over the same span. Those are the players whose trajectory is bending upward fastest.

By our market-value index, Kim Ryun-Seong of Jeju United FC is the most valuable name in this group at 31.

Best talent

Kim Ryun-Seong45.6RTG

Gwangju FC · 24/25→25/26

Most improved

Song Jun-Seok+17.2SsN

Gangwon FC · 24/25→25/26

23 players · ranked by best potentialCustomise →

#	Player	Team	Age	Season	Rating
1	Kim Ryun-Seong Full-back	Jeju United FC	24	13	4620.6%
2	Jo Seong-Kwon Full-back	Gwangju FC	25	18592.3%	448.9%
3	Cho Hyun-Taek Full-back	Ulsan Hyundai FC	24	1118%	430.5%
4	Song Jun-Seok Full-back	Gangwon FC	25	25232.4%	419.3%
5	Kang Joon-Hyuck Full-back	Gangwon FC	26	17	36
6	Park Cheol-Woo Full-back	Gimcheon Sangmu FC	28	1329.8%	3029.9%
7	Park Seung-Wook Full-back	Pohang Steelers	29	2052.6%	2931.3%
8	Kim Tae-Hyun Full-back	Jeonbuk Motors	29	17113.6%	2820.6%
9	Lee Si-Young Full-back	Suwon City FC	29	6800%	2724.2%
10	Oh In-Pyo Full-back	Gimcheon Sangmu FC	29	6	2613%
11	Kim Moon-Hwan Full-back	Daejeon Citizen	30	912%	2415.2%
12	Park Soo-Il Full-back	FC Seoul	30	1448.5%	2331.6%
13	Park Chan-Yong Full-back	Gimcheon Sangmu FC	30	159.7%	2325.6%
14	Lee Myung-Jae Full-back	Daejeon Citizen	32	1062.3%	1938.5%
15	Kang Sang-Woo Full-back	Ulsan Hyundai FC	32	1458.7%	1743%
16	Kim Dong-Jin Full-back	FC Anyang	33	1275.8%	1558.5%
17	Kim Jin-Su Full-back	FC Seoul	34	1794.3%	1328.5%
18	Sim Sang-Min Full-back	Gwangju FC	33	12116.4%	1330.4%
19	Kim Tae-Hwan Full-back	Jeonbuk Motors	36	1696.4%	125.5%
20	Lee Tae-Hee Full-back	FC Anyang	34	10125.6%	1148.1%
21	Rim Chang-Woo Full-back	Jeju United FC	34	1037%	1145.7%
22	Shin Kwang-Hoon Full-back	Pohang Steelers	39	1328.6%	642.6%
23	Lee Yong Full-back	Suwon City FC	39	756%	652.5%