| PLAYER | YEAR | TEAM | G | IP | H | ER | BB | SO | ERA | W | L | PCT | SV | BSV | GS | CG | SHO | WHIP |
| Innis, Jeff | 1992 | VAN | 72 | 104.0 | 98 | 42 | 47 | 76 | 3.63 | 11 | 5 | 0.688 | 2 | 0 | 0 | 0 | 1.39 | |
| Innis, Jeff | 1993 | CHA | 39 | 107.7 | 153 | 77 | 66 | 54 | 6.44 | 2 | 4 | 0.333 | 5 | 4 | 0 | 0 | 0 | 2.03 |
| CAREER | 111 | 211.7 | 251 | 119 | 113 | 130 | 5.06 | 13 | 9 | 0.591 | 7 | 4 | 0 | 0 | 0 | 1.72 | ||
| Irabu, Hideki | 1999 | PHI | 25 | 145.3 | 144 | 78 | 80 | 93 | 4.83 | 7 | 11 | 0.389 | 0 | 0 | 18 | 0 | 0 | 1.54 |
| Irabu, Hideki | 2000 | AUS | 2 | 11.3 | 13 | 9 | 4 | 10 | 7.15 | 0 | 2 | 0.000 | 0 | 0 | 2 | 0 | 0 | 1.50 |
| CAREER | 27 | 156.7 | 157 | 87 | 84 | 103 | 5.00 | 7 | 13 | 0.350 | 0 | 0 | 20 | 0 | 0 | 1.54 | ||
| Ishii, Kazuhisa | 2003 | PHX | 33 | 158.0 | 193 | 101 | 143 | 115 | 5.75 | 8 | 11 | 0.421 | 0 | 0 | 33 | 0 | 0 | 2.13 |
| Ishii, Kazuhisa | 2004 | PHX | 32 | 156.7 | 187 | 131 | 125 | 146 | 7.53 | 7 | 13 | 0.350 | 0 | 0 | 32 | 0 | 0 | 1.99 |
| Ishii, Kazuhisa | 2005 | PHX | 32 | 179.7 | 194 | 108 | 103 | 92 | 5.41 | 7 | 15 | 0.318 | 0 | 0 | 32 | 1 | 0 | 1.65 |
| CAREER | 97 | 494.3 | 574 | 340 | 371 | 353 | 6.19 | 22 | 39 | 0.361 | 0 | 0 | 97 | 1 | 0 | 1.91 | ||
| Isringhausen, Jason | 1996 | COL | 26 | 128.0 | 171 | 106 | 58 | 93 | 7.45 | 5 | 14 | 0.263 | 0 | 0 | 26 | 1 | 0 | 1.79 |
| Isringhausen, Jason | 1997 | PHX | 5 | 20.3 | 29 | 22 | 18 | 9 | 9.74 | 0 | 4 | 0.000 | 0 | 0 | 5 | 0 | 0 | 2.31 |
| Isringhausen, Jason | 2000 | HAW | 16 | 26.7 | 27 | 14 | 13 | 21 | 4.73 | 3 | 4 | 0.429 | 0 | 1 | 0 | 0 | 0 | 1.50 |
| Isringhausen, Jason | 2001 | HBK | 70 | 86.7 | 89 | 45 | 38 | 60 | 4.67 | 3 | 7 | 0.300 | 3 | 4 | 0 | 0 | 0 | 1.47 |
| Isringhausen, Jason | 2002 | HBK | 54 | 66.7 | 69 | 24 | 23 | 56 | 3.24 | 4 | 7 | 0.364 | 28 | 8 | 0 | 0 | 0 | 1.38 |
| Isringhausen, Jason | 2003 | HBK | 60 | 73.0 | 66 | 23 | 37 | 57 | 2.84 | 5 | 9 | 0.357 | 25 | 8 | 0 | 0 | 0 | 1.41 |
| Isringhausen, Jason | 2004 | HBK | 74 | 87.7 | 66 | 31 | 50 | 70 | 3.18 | 6 | 7 | 0.462 | 26 | 1 | 0 | 0 | 0 | 1.32 |
| Isringhausen, Jason | 2005 | HBK | 71 | 98.0 | 70 | 26 | 22 | 88 | 2.39 | 8 | 4 | 0.667 | 33 | 6 | 0 | 0 | 0 | 0.94 |
| Isringhausen, Jason | 2006 | HBK | 61 | 67.3 | 61 | 26 | 28 | 51 | 3.48 | 5 | 8 | 0.385 | 28 | 8 | 0 | 0 | 0 | 1.32 |
| Isringhausen, Jason | 2007 | HBK | 44 | 49.0 | 42 | 31 | 28 | 54 | 5.69 | 3 | 3 | 0.500 | 11 | 1 | 0 | 0 | 0 | 1.43 |
| Isringhausen, Jason | 2008 | HBK | 30 | 40.3 | 24 | 10 | 15 | 29 | 2.23 | 3 | 3 | 0.500 | 9 | 1 | 0 | 0 | 0 | 0.97 |
| Isringhausen, Jason | 2008 | PHI | 30 | 42.7 | 35 | 16 | 12 | 32 | 3.38 | 2 | 3 | 0.400 | 2 | 3 | 0 | 0 | 0 | 1.10 |
| CAREER | 541 | 786.3 | 749 | 374 | 342 | 620 | 4.28 | 47 | 73 | 0.392 | 165 | 41 | 31 | 1 | 0 | 1.39 | ||
| Iwakuma, Hisashi | 2013 | RWD | 34 | 184.7 | 204 | 111 | 78 | 136 | 5.41 | 8 | 10 | 0.444 | 0 | 0 | 32 | 0 | 0 | 1.53 |
| Iwakuma, Hisashi | 2014 | ALN | 33 | 251.7 | 201 | 92 | 50 | 199 | 3.29 | 15 | 10 | 0.600 | 0 | 0 | 33 | 9 | 0 | 1.00 |
| CAREER | 67 | 436.3 | 405 | 203 | 128 | 335 | 4.19 | 23 | 20 | 0.535 | 0 | 0 | 65 | 9 | 0 | 1.22 | ||