| Season | Age | Team | G | GS | IP | K/9 | BB/9 | HR/9 | BABIP | ERA | FIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | 34 | KT Wiz | 3 | 0 | 2.1 | 7.7 | 3.9 | 0.0 | 0.600 | 15.43 | 5.72 | -0.01 |
| 2019 | 33 | KT Wiz | 14 | 14 | 57.0 | 4.1 | 3.9 | 0.8 | 0.305 | 5.05 | 5.27 | 0.12 |
| 2018 | 32 | KT Wiz | 29 | 29 | 156.1 | 4.5 | 3.9 | 1.1 | 0.353 | 5.41 | 5.78 | 1.28 |
| 2017 | 31 | Kiwoom Heroes | 36 | 7 | 54.0 | 7.0 | 5.5 | 0.5 | 0.415 | 6.33 | 4.84 | 0.29 |
| 2016 | 30 | Kiwoom Heroes | 14 | 2 | 26.1 | 5.5 | 3.1 | 0.7 | 0.351 | 5.13 | 4.65 | 0.23 |
| 2015 | 29 | Kiwoom Heroes | 7 | 5 | 22.0 | 4.5 | 5.7 | 0.8 | 0.307 | 4.50 | 5.91 | -0.02 |
| 2014 | 28 | Kiwoom Heroes | 11 | 11 | 41.2 | 5.2 | 6.5 | 0.9 | 0.329 | 6.05 | 6.53 | -0.01 |
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