Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 10/2020 |  | Seong-yun Kwon | FW | |||
| 09/2020 | | Hyuk-sun Park | MA | |||
| 08/2020 | | Ho-young Kim | MA | |||
| 07/2020 | | Sung-yueng Ki | MF |  | RCD Mallorca | Mallorca |
| 07/2020 | | Seok-yeong Cho | DF | |||
| 06/2020 | | Young-sun Yun | DF |  | Ulsan HD FC | Ulsan HD FC |
| 05/2020 | | Sang-hee Kang | DF | |||
| 02/2020 |  | Adriano | FW | |||
| 01/2020 | | Seung-gyu Han | MF |  | Jeonbuk FC | Jeonbuk |
| 01/2020 | | Oh-yeon Cha | DF |  | Hanyang University | Hanyang University |
| 01/2020 | | Yu-min Yang | DF | |||
| 01/2020 | | Chan-hee Han | MF |  | Jeonnam Dragons | Jeonnam Dragons |
| 01/2020 | | Jin-seong Kim | MF | |||
| 01/2020 | | Jin-ya Kim | MF |  | Incheon United | Incheon United |
| 01/2020 | | Han-min Jung | FW | |||
| 01/2020 | | Seung-jae Lee | FW |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2020 | | Joon-young Park | DF |  | Ansan Greeners | Ansan Greeners |
| 07/2020 | | Han-gil Kim | FW | | Jeonnam Dragons | Jeonnam Dragons |
| 06/2020 |  | Aleksandar Pešić | FW |  | Al Ittihad | Al Ittihad |
| 05/2020 | | Dong-jin Park | DF |  | Gimcheon Sangmu | Gimcheon Sangmu |
| 05/2020 | | Won-jin Jung | MF | | Gimcheon Sangmu | Gimcheon Sangmu |
| 02/2020 | | Chang-mo Ku | MF |  | Ulsan Citizen FC | Ulsan Citizen FC |
| 01/2020 | | Ki-wook Hwang | DF | | Jeonnam Dragons | Jeonnam Dragons |
| 01/2020 | | Woo-ram Jeon | DF |  | Pocheon FC | Pocheon |
| 01/2020 | | Myung-joo Lee | MF |  | Al Wahda | Al Wahda |
| 01/2020 | | Seong-jae Shin | MF | | Jeonnam Dragons | Jeonnam Dragons |
| 01/2020 | | Seung-won Yoon | MF |  | Daejeon Hana Citizen | Daejeon |
| 01/2020 | | Hee-seong Park | FW |  | Gimhae FC | Gimhae FC |