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| "O" Pitching Register | |
| Batting Register | Pitching Glossary |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO | PWS |
| Vernon Olguin | 2007-2009 | 25 | 29 | .463 | 5.21 | 90 | 69 | 1 | 0 | 0 | 452.3 | 520 | 262 | 59 | 103 | 272 | 16.7 |
| Ruben Olmeda | 2007-2009 | 17 | 31 | .354 | 4.92 | 66 | 66 | 2 | 2 | 0 | 385.7 | 355 | 211 | 58 | 153 | 356 | 18.4 |
| Frank Oneill | 2007-2007 | 4 | 9 | .308 | 6.34 | 16 | 16 | 0 | 0 | 0 | 92.3 | 118 | 65 | 15 | 27 | 54 | 0.8 |
| Isaac Ortega | 2007-2009 | 13 | 15 | .464 | 4.61 | 50 | 45 | 1 | 0 | 0 | 279.0 | 318 | 143 | 23 | 90 | 100 | 13.6 |
| Marcos Ortiz | 2009-2009 | 5 | 6 | .455 | 4.69 | 23 | 23 | 0 | 0 | 0 | 142.0 | 178 | 74 | 13 | 30 | 67 | 6.0 |
| Dario Ozuna | 2007-2009 | 3 | 6 | .333 | 5.17 | 83 | 0 | 0 | 0 | 11 | 87.0 | 96 | 50 | 17 | 34 | 72 | 4.6 |
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