 |
|
|
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
|---|---|---|---|---|---|---|---|---|---|
| Chi-hun O | 2021-2022 | .000 | 0 | 0 | 1 | 0 | 1 | 1.35 | 4 |
| Eddie O'Bryan | 2026-2026 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Dan O'Day | 2026-2026 | .280 | 0 | 3 | 0 | 0 | 0 | 0.00 | 0 |
| Gary O'Herlihy | 2024-2024 | .000 | 0 | 0 | 0 | 0 | 0 | 8.44 | 2 |
| Larry O'Morgan | 2025-2025 | .250 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Dustin O'Quinlevan | 2020-2020 | .305 | 1 | 21 | 0 | 0 | 0 | 0.00 | 0 |
| Taro Ohayashi | 2020-2020 | .000 | 0 | 0 | 7 | 5 | 0 | 2.55 | 79 |
| Luis Oliva | 2020-2020 | .000 | 0 | 0 | 0 | 0 | 0 | 3.38 | 1 |
| Ramón Oliveira | 2020-2021 | .000 | 0 | 0 | 2 | 6 | 0 | 7.28 | 37 |
| Robert Olson | 2021-2021 | .000 | 0 | 0 | 0 | 0 | 0 | 4.19 | 13 |
| Emil Olsson | 2025-2026 | .000 | 0 | 0 | 8 | 6 | 0 | 3.65 | 105 |
| José Olvera | 2026-2026 | .315 | 0 | 7 | 0 | 0 | 0 | 0.00 | 0 |
| Juan Ordóńez | 2023-2023 | .000 | 0 | 0 | 6 | 2 | 1 | 4.07 | 25 |
| José Orihvela | 2026-2026 | .143 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Germán Orozco | 2020-2020 | .000 | 0 | 0 | 3 | 2 | 5 | 2.37 | 31 |
| Cisco Ortega | 2021-2026 | .000 | 0 | 0 | 3 | 2 | 2 | 2.26 | 51 |
| Juan Ortega | 2021-2021 | .237 | 0 | 5 | 0 | 0 | 0 | 0.00 | 0 |
| Pedro Ortega | 2026-2026 | .230 | 2 | 10 | 0 | 0 | 0 | 0.00 | 0 |
| Armando Ortíz | 2021-2025 | .000 | 0 | 0 | 43 | 20 | 0 | 2.71 | 564 |
| Cisco Ortíz | 2023-2023 | .000 | 0 | 0 | 7 | 7 | 0 | 3.40 | 131 |
| Emílio Ortíz | 2020-2020 | .272 | 0 | 20 | 0 | 0 | 0 | 0.00 | 0 |
| Jesús Ortíz | 2023-2023 | .226 | 3 | 21 | 0 | 0 | 0 | 0.00 | 0 |
| José Ortíz | 2025-2026 | .319 | 2 | 24 | 0 | 0 | 0 | 0.00 | 0 |
| José Antonio Ortíz | 2025-2025 | 1.000 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Pancho Ortíz | 2025-2025 | .000 | 0 | 0 | 2 | 1 | 10 | 1.38 | 38 |
| Raúl Ortíz | 2022-2023 | .286 | 2 | 30 | 0 | 0 | 0 | 0.00 | 0 |
| Reynaldo Ortíz | 2020-2020 | .000 | 0 | 0 | 0 | 0 | 0 | 1.12 | 9 |
| Sergio Ortíz | 2021-2022 | .259 | 9 | 33 | 0 | 0 | 0 | 0.00 | 0 |
| Richard Osborn | 2025-2026 | .000 | 0 | 0 | 2 | 6 | 26 | 2.35 | 79 |
| José Osorio | 2021-2021 | .281 | 0 | 24 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Kichisaburo Otani | 2020-2023 | .249 | 3 | 47 | 0 | 0 | 0 | 0.00 | 0 |
| Odemar Ouweneel | 2021-2021 | .000 | 0 | 0 | 3 | 1 | 11 | 0.57 | 39 |
