The most improved U23 players in K League 1, ranked on Field Insider.
Jin Si-Woo of Gwangju FC is the standout for raw talent across U23 players in K League 1, with a Field Insider Rating of 49.3, and Kim Ju-Chan leads the scoring with 1 goal.
The numbers a scout watches are the year-on-year jumps: Lee Seung-Won has improved his Season rating most, up +14.1 on last season, while Lee Hyun-Yong's scouting Rating has risen fastest, +2.6 over the same span. Those are the players whose trajectory is bending upward fastest.
By our market-value index, Jin Si-Woo of Gwangju FC is the most valuable name in this group at 13.9.
| # | Player | Team | Age | ΔSsN | Season | Rating |
|---|---|---|---|---|---|---|
| 1 | Lee Seung-WonCentral midfielder |  Gimcheon Sangmu FC | 23 | +14.1 24/25→25/26 | 19293.7% | 460.7% |
| 2 | Hwang Do-YoonCentral midfielder |  FC Seoul | 23 | +11.5 24/25→25/26 | 15294.9% | 430.5% |
| 3 | Shin Min-HaCentre-back |  Gangwon FC | 20 | +8.9 24/25→25/26 | 14185.4% | 441.6% |
| 4 | Lee Hyun-YongCentre-back |  Suwon City FC | 22 | +7.2 24/25→25/26 | 10225% | 446.3% |
| 5 | Park Seong-HunCentre-back | FC Seoul | 23 | -2.7 24/25→25/26 | 826% | 417.6% |
| 6 | Hwang Jae-WonCentral midfielder |  Daegu FC | 23 | -3.9 24/25→25/26 | 734.8% | 4415.7% |
| 7 | Jeon Byung-KwanAttacking midfielder |  Jeonbuk Motors | 23 | -10.5 24/25→25/26 | 955% | 475.2% |
| 8 | Kang Sang-YoonAttacking midfielder | Jeonbuk Motors | 22 | -15.4 24/25→25/26 | 479% | 463.3% |
