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Most Improved defenders This Season in K League 1

The most improved defenders in K League 1, ranked on Field Insider.

Most improved goalkeepers in K League 1Most improved midfielders in K League 1Most improved attackers in K League 1Best defenders in K League 1Most in-form defenders in K League 1Top-scoring defenders in K League 1

At a glance

Kim Ryun-Seong of Jeju United FC is the standout for raw talent across defenders 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 Kim Hyeon-Jun 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, +3.4 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 11.2.

Best talent
Kim Ryun-Seong45.6RTG
Jeju United FC
In form
Song Jun-Seok24.6SsN
Gangwon FC
Rising potential
Jo Seong-Kwon+3.4RTG
Gwangju FC · 24/25→25/26
Most improved
Song Jun-Seok+17.2SsN
Gangwon FC · 24/25→25/26
Top scorer
Kim Hyeon-Jun2goals
Daegu FC
Most valuable
Kim Ryun-Seong11.2val
Jeju United FC
48 players · ranked by most improvedCustomise →
PlayerTeam
1Song Jun-SeokCentre-backGangwon FC25+17.2
24/25→25/26
25232.4%419.3%
2Jo Seong-KwonCentre-backGwangju FC25+15.4
24/25→25/26
18592.3%448.4%
3Hong Jeong-HoCentre-backJeonbuk Motors36+14.2
24/25→25/26
20244.8%12±0%
4Lee You-HyeonCentre-backGangwon FC29+11
24/25→25/26
18159.4%2630.6%
5Kim Tae-HyunCentre-backJeonbuk Motors29+9.2
24/25→25/26
17113.6%2820.9%
6Shin Min-HaFull-backGangwon FC20+8.9
24/25→25/26
14185.4%441.6%
7Kim Jin-SuFull-backFC Seoul34+8.3
24/25→25/26
1794.3%1328.5%
8Kim Tae-HwanFull-backJeonbuk Motors37+8
24/25→25/26
1696.4%841.4%
9Byeon Jun-SooCentre-backGwangju FC24+7.6
24/25→25/26
1686.4%4410.3%
10Lee Hyun-YongCentre-backSuwon City FC22+7.2
24/25→25/26
10225%446.3%
11Eo Jeong-WonFull-backPohang Steelers27+7.2
24/25→25/26
1771.3%3613.9%
12Jeon Min-GwangCentre-backPohang Steelers33+6.8
24/25→25/26
2244.2%1541.6%
13Sim Sang-MinCentre-backGwangju FC33+6.4
24/25→25/26
12116.4%1330.4%
14Lee Tae-HeeCentre-backFC Anyang34+5.4
22/23→25/26
10125.6%1148.1%
15Yazan Al ArabCentre-backFC Seoul30+3.3
24/25→25/26
1822.6%2422.2%
16Lee Zi-SolCentre-backSuwon City FC27+3.2
24/25→25/26
6123.1%3415%
17M. TuciCentre-backGangwon FC27+2.9
24/25→25/26
1720.4%3432%
18Kim Young-GwonFull-backUlsan Hyundai FC36+1.7
24/25→25/26
219%1310.5%
19Kim Moon-HwanFull-backDaejeon Citizen31+1
24/25→25/26
912%2027.8%
20Kim Kang-SanCentre-backGimcheon Sangmu FC27+0.5
24/25→25/26
124.3%3513.9%
21Kwon Kyung-WonCentre-backFC Anyang34-0.2
24/25→25/26
82.4%1045.3%
22A. KrivotsyukFull-backDaejeon Citizen27-0.2
24/25→25/26
111.8%3719.5%
23Song Ju-HunFull-backJeju United FC32-0.4
24/25→25/26
172.3%1739.6%
24Jeong Woo-JaeCentre-backDaegu FC34-0.5
24/25→25/26
223.8%936.5%
25Kim Tae-HanFull-backSuwon City FC30-0.8
24/25→25/26
107.3%2331.4%
26Lim Chai-MinCentre-backJeju United FC35-0.9
24/25→25/26
127.3%1121.4%
27Kim Young-BinFull-backJeonbuk Motors34-0.9
24/25→25/26
108.1%1051.6%
28Park Chan-YongFull-backGimcheon Sangmu FC30-2.1
24/25→25/26
1115.7%2325.2%
29Lee Jung-TaekCentre-backGimcheon Sangmu FC28-2.2
24/25→25/26
1314.9%3127.3%
30Choi Kyu-BaekCentre-backSuwon City FC32-2.5
24/25→25/26
824.8%1732.7%
31Park Seong-HunCentre-backFC Seoul23-2.7
24/25→25/26
826%417.6%
32Caio MarceloFull-backDaegu FC28-3.7
24/25→25/26
735.2%3122.3%
33Kim Min-DukCentre-backDaejeon Citizen30-5.6
24/25→25/26
840%2325.6%
34Rim Chang-WooFull-backJeju United FC34-6
24/25→25/26
1037%1145.7%
35Choi Kyoung-RokFull-backGwangju FC31-6.8
24/25→25/26
1531.2%2038.9%
36Lee Gi-HyukCentre-backGangwon FC26-7.4
24/25→25/26
1238.1%3630.8%
37Lee YongFull-backSuwon City FC39-8.9
24/25→25/26
756%652.5%
38Jung Seung-HyunCentre-backUlsan Hyundai FC32-11.4
23/24→25/26
1054.3%1646.1%
39T. Oude KotteCentre-backFC Anyang30-13.8
24/25→25/26
766.7%2532.9%
40Ha Chang-RaeCentre-backDaejeon Citizen31-14.4
24/25→25/26
767.3%1941.4%
41Park Soo-IlFull-backFC Seoul30-15.5
24/25→25/26
1157.8%2236.5%
42Kim Ju-SungCentre-backFC Seoul25-15.8
24/25→25/26
1062%3821.2%
43Lee Myung-JaeFull-backDaejeon Citizen32-16.2
24/25→25/26
1062.3%1938.5%
44Kang Sang-WooCentre-backUlsan Hyundai FC32-19.3
24/25→25/26
1458.7%1743.3%
45Choi JunFull-backFC Seoul27-21.1
24/25→25/26
1657.2%3333.7%
46Jang Min-GyuCentre-backJeju United FC27-24.5
24/25→25/26
778.3%3331.8%
47Park Seung-WookCentre-backPohang Steelers29-28.3
24/25→25/26
1467.1%2735.9%
48Kim Dong-JinFull-backFC Anyang33-36.3
22/23→25/26
1275.8%1558.5%