| Season | Age | Team | G | GS | IP | K/9 | BB/9 | HR/9 | BABIP | ERA | FIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | 36 | LG Twins | 50 | 1 | 50 | 4.3 | 3.4 | 0.7 | 0.314 | 5.04 | 4.95 | -0.09 |
| 2019 | 35 | LG Twins | 63 | 0 | 60.0 | 5.4 | 3.5 | 0.9 | 0.354 | 5.25 | 4.75 | -0.43 |
| 2018 | 34 | Hanwha Eagles | 68 | 0 | 79.1 | 6.9 | 3.7 | 0.2 | 0.315 | 2.50 | 4.00 | 1.19 |
| 2017 | 33 | Hanwha Eagles | 13 | 6 | 37.1 | 3.6 | 5.5 | 1.0 | 0.313 | 6.51 | 6.36 | -0.20 |
| 2016 | 32 | Hanwha Eagles | 30 | 27 | 122.0 | 6.3 | 3.6 | 1.0 | 0.357 | 6.42 | 5.06 | 1.66 |
| 2015 | 31 | Hanwha Eagles | 33 | 14 | 70.1 | 6.1 | 3.8 | 1.3 | 0.373 | 7.04 | 5.48 | 0.12 |
| 2014 | 30 | Kia Tigers | 27 | 11 | 78.2 | 6.9 | 4.9 | 1.3 | 0.380 | 7.32 | 5.89 | 0.03 |
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