
| Season | Team | ERA | G | W | L | SV | HLD | IP | H | HR | BB | SO | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Career | 15 Seasons | 4.21 | 451 | 84 | 73 | 22 | 29 | 1336.0 | 496 | 968 | 1.37 | ||
| 2019 | SK | 9.82 | 4 | 0 | 0 | 1 | 1 | 3.0 | 0 | 0 | 3 | 3 | 3.33 |
| 2018 | SK | 4.80 | 29 | 2 | 1 | 1 | 3 | 30.0 | 0 | 0 | 8 | 15 | 1.37 |
| 2017 | SK | 6.84 | 43 | 6 | 4 | 0 | 6 | 50.0 | 0 | 0 | 15 | 43 | 1.54 |
| 2016 | SK | 4.30 | 68 | 6 | 3 | 2 | 9 | 83.0 | 0 | 0 | 29 | 67 | 1.28 |
| 2015 | SK | 6.07 | 33 | 4 | 4 | 0 | 1 | 83.0 | 0 | 0 | 27 | 78 | 1.57 |
| 2014 | SK | 6.37 | 27 | 8 | 12 | 0 | 0 | 130.0 | 0 | 0 | 49 | 87 | 1.54 |
| 2013 | SK | 7.97 | 12 | 0 | 3 | 1 | 0 | 20.0 | 0 | 0 | 16 | 12 | 2.30 |
| 2012 | SK | 3.16 | 14 | 3 | 3 | 0 | 0 | 62.0 | 0 | 0 | 22 | 42 | 1.44 |
| 2009 | SK | 4.70 | 28 | 3 | 3 | 2 | 3 | 61.0 | 0 | 0 | 25 | 53 | 1.49 |
| 2008 | SK | 2.70 | 27 | 10 | 2 | 0 | 1 | 136.0 | 0 | 0 | 43 | 81 | 1.24 |
| 2007 | SK | 2.84 | 28 | 11 | 8 | 0 | 0 | 146.0 | 0 | 0 | 47 | 84 | 1.26 |
| 2006 | SK | 3.07 | 27 | 7 | 8 | 0 | 0 | 152.0 | 0 | 0 | 55 | 97 | 1.26 |
| 2005 | SK | 4.24 | 26 | 8 | 8 | 0 | 1 | 121.0 | 0 | 0 | 54 | 96 | 1.30 |
| 2003 | SK | 4.82 | 34 | 9 | 5 | 4 | 2 | 114.0 | 0 | 0 | 59 | 84 | 1.51 |
| 2002 | SK | 3.19 | 51 | 7 | 9 | 11 | 2 | 141.0 | 0 | 0 | 44 | 126 | 1.16 |
| Category | Stats | KBO Rank | Team Rank |
|---|---|---|---|
| G | 451 | - | - |
| ERA | 4.21 | - | - |
| IP | 1336.0 | - | - |
| W | 84 | - | - |
| L | 73 | - | - |
| SV | 22 | - | - |
| HLD | 29 | - | - |
| SO | 968 | - | - |
| H | 0 | - | - |
| HR | 0 | - | - |
| BB | 496 | - | - |
| R | 659 | - | - |
| ER | 625 | - | - |
| HBP | 68 | - | - |
| WHIP | 1.37 | - | - |