| K League 1 2018 Relegation - Appearances as Referee |  |
 |
 |
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| 28/10/2018 | Incheon United | - | Daegu FC | 0:1 | 1 | - | - |
| 24/11/2018 | Jeonnam Dragons | - | Daegu FC | 1:2 | 4 | - | - |
| K League 1 2018 Relegation - Appearances as Referee | |
|
|
||||
| 28/10/2018 | Incheon United | - | Daegu FC | 0:1 | 1 | - | - |
| 24/11/2018 | Jeonnam Dragons | - | Daegu FC | 1:2 | 4 | - | - |
| Complete name: | Hyung-jin Ko |
| Born: | 20/06/1982 |
| Place of birth: |
South Korea |
| Nationality: |
South Korea |