Entradas
| a partir de | Apellido | Pos | Equipo | Equipo | ||
|---|---|---|---|---|---|---|
| 11/2021 |  | Jeong-bin Lee | M |  | Gimcheon Sangmu | Gimcheon Sangmu |
| 06/2021 | | Tae-jun Park | M |  | Seongnam FC | Seongnam FC |
| 02/2021 | | Jae-hyeon Mo | M |  | Suwon FC | Suwon FC |
| 01/2021 | | Sun-young Lim | A | |||
| 01/2021 | | Jun-yeon Jeong | D |  | Gwangju FC | Gwangju FC |
| 01/2021 | | Dong-gyu Baek | D |  | Jeju SK FC | Jeju SK FC |
| 01/2021 | | Seung-un Ha | A |  | Pohang Steelers | Pohang Steelers |
| 01/2021 | | Kyung-jung Kim | M |  | Gangwon FC | Gangwon FC |
| 01/2021 | | Dong-woon Shim | A | | Pohang Steelers | Pohang Steelers |
| 01/2021 | | Min-seo Choi | A | | Pohang Steelers | Pohang Steelers |
| 01/2021 | | Seung-kyum Im | D | | Seongnam FC | Seongnam FC |
| 01/2021 | | Chang-beom Hong | M |  | Sungkyunkwan University | Sungkyunkwan University |
| 01/2021 | | Dae-han Park | D |  | Incheon United | Incheon United |
| 01/2021 |  | Jonathan Moya | A |
Salidas
| a partir de | Apellido | Pos | Equipo | Equipo | ||
|---|---|---|---|---|---|---|
| 07/2021 | | Bon-Hyeok Koo | M |  | Chungju Citizen FC | Chungju Citizen FC |
| 07/2021 | | Dong-su Kim | D |  | Hoàng Anh Gia Lai | Hoàng Anh Gia Lai |
| 06/2021 | | Ho-jung Choi | M |  | Jeonnam Dragons | Jeonnam Dragons |
| 01/2021 | | Yo-Han Park | D | | Suwon FC | Suwon FC |
| 01/2021 | | Mun-ki Hwang | M | | Gangwon FC | Gangwon FC |
| 01/2021 | | Ki-pyo Kwon | M | | Pohang Steelers | Pohang Steelers |
| 01/2021 | | Gyeong-min Kim | A | | Jeonnam Dragons | Jeonnam Dragons |