| Pitching | G | GS | CG | IP | H | R | ER | HR | SH | SF | HP | BB | K | IB | W | L | Pct | Sv | ERA | |
| O'Dell,Billy* | 18 | 18 | 6 | 126.1 | 154 | 81 | 69 | 12 | 15 | 5 | 1 | 43 | 74 | 6 | 5 | - | 9 | 0.357 | 0 | 4.92 |
| Odom,Blue Moon | 6 | 6 | 0 | 29.1 | 52 | 32 | 32 | 6 | 2 | 1 | 0 | 21 | 10 | 0 | 0 | - | 4 | 0.000 | 0 | 9.82 |
| Ogea,Chad | 14 | 11 | 0 | 83.1 | 64 | 31 | 29 | 10 | 4 | 3 | 1 | 31 | 47 | 4 | 6 | - | 5 | 0.545 | 0 | 3.13 |
| Ojeda,Bob* | 6 | 3 | 2 | 29.0 | 22 | 12 | 11 | 0 | 2 | 1 | 1 | 6 | 18 | 2 | 2 | - | 2 | 0.500 | 0 | 3.41 |
| Ojeda,Bobby* | 8 | 8 | 2 | 59.1 | 41 | 14 | 12 | 4 | 3 | 1 | 0 | 8 | 50 | 0 | 6 | - | 2 | 0.750 | 0 | 1.82 |
| Oliver,Darren* | 5 | 1 | 0 | 17.1 | 15 | 7 | 6 | 1 | 2 | 2 | 0 | 4 | 11 | 0 | 3 | - | 0 | 1.000 | 0 | 3.12 |
| Olivo,Diomedes* | 4 | 0 | 0 | 5.0 | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 3 | 0 | 0 | - | 0 | 0.000 | 0 | 1.80 |
| Orosco,Jesse* | 37 | 0 | 0 | 40.2 | 31 | 9 | 9 | 4 | 1 | 3 | 1 | 13 | 34 | 0 | 3 | - | 1 | 0.750 | 7 | 1.99 |
| Ortega,Phil | 5 | 0 | 0 | 10.1 | 11 | 8 | 8 | 2 | 0 | 2 | 0 | 11 | 4 | 3 | 0 | - | 1 | 0.000 | 0 | 6.97 |
| Ortiz,Ramon | 6 | 1 | 0 | 14.1 | 17 | 11 | 11 | 3 | 2 | 4 | 1 | 7 | 7 | 0 | 0 | - | 1 | 0.000 | 1 | 6.91 |
| Osinski,Dan | 7 | 0 | 0 | 8.0 | 11 | 6 | 1 | 1 | 0 | 0 | 0 | 1 | 9 | 1 | 0 | - | 1 | 0.000 | 1 | 1.13 |
| Osteen,Claude* | 6 | 6 | 1 | 43.0 | 60 | 28 | 23 | 0 | 8 | 1 | 0 | 20 | 29 | 1 | 1 | - | 4 | 0.200 | 0 | 4.81 |
| Osuna,Antonio | 8 | 0 | 0 | 10.0 | 13 | 5 | 5 | 0 | 0 | 0 | 1 | 5 | 5 | 0 | 0 | - | 0 | 0.000 | 0 | 4.50 |
| Oswalt,Roy | 9 | 9 | 1 | 66.2 | 71 | 38 | 30 | 12 | 3 | 0 | 2 | 12 | 36 | 1 | 3 | - | 5 | 0.375 | 0 | 4.05 |