| Season | Age | Team | G | GS | IP | K/9 | BB/9 | HR/9 | BABIP | ERA | FIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | 39 | Samsung Lions | 5 | 5 | 18.2 | 1.9 | 5.3 | 0.0 | 0.288 | 5.79 | 5.37 | 0.22 |
| 2019 | 38 | Samsung Lions | 27 | 27 | 145.1 | 4.0 | 3.1 | 0.9 | 0.304 | 4.77 | 4.89 | 1.38 |
| 2018 | 37 | Samsung Lions | 24 | 24 | 117.1 | 6.8 | 2.5 | 2.1 | 0.354 | 6.98 | 6.40 | 0.73 |
| 2017 | 36 | Samsung Lions | 28 | 28 | 174.1 | 6.7 | 1.9 | 1.1 | 0.302 | 4.28 | 4.72 | 3.42 |
| 2016 | 35 | Samsung Lions | 28 | 28 | 180.0 | 4.2 | 2.0 | 1.2 | 0.294 | 4.35 | 5.50 | 2.56 |
| 2015 | 34 | Samsung Lions | 30 | 30 | 194.0 | 7.6 | 1.4 | 1.3 | 0.298 | 3.76 | 4.29 | 4.47 |
| 2014 | 33 | Samsung Lions | 28 | 28 | 170.1 | 7.0 | 2.0 | 1.0 | 0.335 | 4.39 | 4.37 | 4.30 |
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