 |
|
|
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Christian O'Brien | 2026-2027 | 3 | 4 | .429 | 4.86 | 31 | 11 | 0 | 0 | 13 | 76.0 | 69 | 41 | 7 | 56 | 83 |
| Tom O'Day | 2012-2016 | 21 | 12 | .636 | 2.41 | 56 | 56 | 1 | 0 | 0 | 351.0 | 253 | 94 | 22 | 126 | 464 |
| Greg O'Dell | 2023-2025 | 7 | 8 | .467 | 2.87 | 27 | 27 | 0 | 0 | 0 | 150.1 | 114 | 48 | 13 | 57 | 162 |
| Stanley O'Dell | 2024-2026 | 6 | 10 | .375 | 6.68 | 39 | 18 | 0 | 0 | 1 | 103.2 | 100 | 77 | 24 | 71 | 122 |
| Edgar O'Farrell | 2025-2027 | 6 | 10 | .375 | 4.06 | 29 | 29 | 0 | 0 | 0 | 148.2 | 131 | 67 | 16 | 82 | 170 |
| Eric O'Farrell | 2012-2014 | 10 | 5 | .667 | 2.23 | 50 | 8 | 1 | 1 | 25 | 109.0 | 83 | 27 | 7 | 34 | 121 |
| Ben O'Herlihy | 2023-2025 | 0 | 0 | .000 | 6.51 | 32 | 0 | 0 | 0 | 1 | 55.1 | 64 | 40 | 9 | 55 | 56 |
| Brad O'Heyne | 2027-2027 | 0 | 0 | .000 | 8.41 | 14 | 0 | 0 | 0 | 0 | 20.1 | 29 | 19 | 8 | 14 | 20 |
| Dirk O'Keefe | 2026-2027 | 2 | 6 | .250 | 5.79 | 32 | 4 | 0 | 0 | 12 | 51.1 | 45 | 33 | 5 | 39 | 50 |
| Norris O'Keefe | 2025-2027 | 4 | 5 | .444 | 4.61 | 52 | 0 | 0 | 0 | 20 | 54.2 | 48 | 28 | 10 | 38 | 60 |
| Tom O'Mulroy | 2026-2027 | 0 | 0 | .000 | 5.14 | 19 | 0 | 0 | 0 | 0 | 28.0 | 30 | 16 | 3 | 19 | 38 |
| Dave O'Neal | 2025-2027 | 7 | 3 | .700 | 5.40 | 48 | 0 | 0 | 0 | 3 | 63.1 | 61 | 38 | 5 | 52 | 67 |
| Clayton O'Neil | 2012-2015 | 9 | 6 | .600 | 3.54 | 48 | 25 | 0 | 0 | 14 | 165.1 | 127 | 65 | 11 | 61 | 213 |
| Joe O'Neill | 2022-2024 | 6 | 14 | .300 | 5.20 | 32 | 32 | 0 | 0 | 0 | 162.2 | 162 | 94 | 27 | 87 | 170 |
| Kelly O'Neill | 2024-2026 | 3 | 7 | .300 | 5.34 | 27 | 16 | 0 | 0 | 1 | 91.0 | 82 | 54 | 15 | 64 | 69 |
| Wilton O'Neill | 2018-2019 | 6 | 5 | .545 | 3.99 | 17 | 17 | 0 | 0 | 0 | 103.2 | 94 | 46 | 11 | 28 | 110 |
| Steffen O'Slattery | 2026-2026 | 2 | 2 | .500 | 5.80 | 8 | 8 | 0 | 0 | 0 | 35.2 | 34 | 23 | 2 | 29 | 45 |
| Bryant Oglethorpe | 2012-2013 | 4 | 5 | .444 | 6.46 | 47 | 6 | 0 | 0 | 1 | 69.2 | 78 | 50 | 3 | 49 | 92 |
| Larry Oliver | 2022-2024 | 7 | 12 | .368 | 7.59 | 35 | 19 | 0 | 0 | 1 | 110.1 | 119 | 93 | 14 | 99 | 107 |
| Tony Oliver | 2025-2026 | 3 | 1 | .750 | 6.83 | 26 | 0 | 0 | 0 | 3 | 27.2 | 32 | 21 | 3 | 18 | 31 |
| Eric Olsen | 2022-2024 | 6 | 8 | .429 | 5.40 | 39 | 9 | 0 | 0 | 1 | 80.0 | 81 | 48 | 13 | 46 | 75 |
| Bob Olson | 2027-2027 | 0 | 0 | .000 | 3.86 | 11 | 0 | 0 | 0 | 0 | 16.1 | 16 | 7 | 4 | 9 | 15 |
| Melvin Olsson | 2025-2027 | 12 | 7 | .632 | 6.67 | 67 | 0 | 0 | 0 | 1 | 110.2 | 140 | 82 | 12 | 74 | 109 |
| Luis Olvera | 2015-2018 | 13 | 15 | .464 | 3.86 | 38 | 38 | 0 | 0 | 0 | 223.2 | 214 | 96 | 30 | 52 | 221 |
| Yasujiro Ono | 2012-2015 | 11 | 9 | .550 | 3.35 | 42 | 42 | 0 | 0 | 0 | 231.0 | 181 | 86 | 29 | 89 | 376 |
| César Orozco | 2019-2021 | 11 | 7 | .611 | 2.30 | 31 | 31 | 0 | 0 | 0 | 187.2 | 154 | 48 | 14 | 53 | 201 |
| Ángel Ortíz | 2022-2024 | 8 | 5 | .615 | 3.81 | 45 | 21 | 0 | 0 | 0 | 139.1 | 125 | 59 | 19 | 70 | 146 |
| Armando Ortíz | 2022-2024 | 5 | 7 | .417 | 3.87 | 57 | 9 | 0 | 0 | 3 | 109.1 | 112 | 47 | 13 | 34 | 92 |
| Félix Ortíz | 2012-2015 | 19 | 9 | .679 | 3.10 | 39 | 39 | 2 | 2 | 0 | 258.2 | 252 | 89 | 6 | 60 | 301 |
| Fernando Ortíz | 2026-2027 | 1 | 4 | .200 | 6.71 | 26 | 8 | 0 | 0 | 1 | 59.0 | 61 | 44 | 7 | 40 | 64 |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
| Jesús Ortíz | 2012-2016 | 16 | 10 | .615 | 3.13 | 69 | 33 | 0 | 0 | 17 | 224.1 | 191 | 78 | 16 | 80 | 249 |
| José Ortíz | 2022-2024 | 5 | 8 | .385 | 5.26 | 61 | 0 | 0 | 0 | 24 | 63.1 | 54 | 37 | 8 | 47 | 86 |
| Pablo Ortíz | 2022-2024 | 9 | 1 | .900 | 3.66 | 39 | 8 | 0 | 0 | 0 | 93.1 | 82 | 38 | 9 | 51 | 99 |
| Robert Osborne | 2012-2013 | 8 | 7 | .533 | 2.46 | 22 | 22 | 2 | 0 | 0 | 150.0 | 112 | 41 | 9 | 45 | 204 |
| Woody Owen | 2012-2013 | 4 | 8 | .333 | 5.04 | 21 | 21 | 0 | 0 | 0 | 119.2 | 112 | 67 | 20 | 56 | 166 |
| Conan Owens | 2025-2027 | 7 | 4 | .636 | 5.47 | 71 | 1 | 0 | 0 | 1 | 105.1 | 102 | 64 | 16 | 71 | 117 |
