| Season | Age | Team | G | GS | IP | K/9 | BB/9 | HR/9 | BABIP | ERA | FIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | 36 | Lotte Giants | 22 | 21 | 115.2 | 5.2 | 2.6 | 1.3 | 0.280 | 4.75 | 5.26 | 1.17 |
| 2018 | 34 | Lotte Giants | 33 | 19 | 132.1 | 6.1 | 2.0 | 1.2 | 0.269 | 4.08 | 4.96 | 1.71 |
| 2017 | 33 | Lotte Giants | 9 | 2 | 14.2 | 4.9 | 4.9 | 2.5 | 0.382 | 11.66 | 7.97 | -0.30 |
| 2016 | 32 | Lotte Giants | 22 | 20 | 94.2 | 4.9 | 4.6 | 1.2 | 0.342 | 6.85 | 6.11 | 0.54 |
| 2015 | 31 | Doosan Bears | 47 | 0 | 58.1 | 6.3 | 5.7 | 0.9 | 0.288 | 4.47 | 5.64 | -0.49 |
| 2014 | 30 | Doosan Bears | 29 | 19 | 109.2 | 6.1 | 5.7 | 1.1 | 0.358 | 9.03 | 6.00 | -0.16 |
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