| K League 1 2012 Relegation - Appearances as Referee |  |
 |
 |
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| 03/10/2012 | Gwangju FC | - | Daejeon Citizen | 1:1 | - | - | - |
| 11/11/2012 | Incheon United | - | Chunnam Dragons | 0:0 | 2 | - | - |
| K League 1 2012 Relegation - Appearances as Referee | |
|
|
||||
| 03/10/2012 | Gwangju FC | - | Daejeon Citizen | 1:1 | - | - | - |
| 11/11/2012 | Incheon United | - | Chunnam Dragons | 0:0 | 2 | - | - |
| Complete name: | Sang-Il Woo |
| Born: | |
| Place of birth: |
South Korea |
| Nationality: |
South Korea |