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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | IP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Shohei Otani# | 2495.2 | 2032-2035 | |
| 2 | Júlio Becerra | 2277.2 | 2025-2032 | |
| 3 | Markus Thompson | 2259.0 | 2026-2028 | |
| 4 | Ramón Hernández | 1885.1 | 2025-2028 | |
| 5 | Chet Mathis# | 1863.0 | 2031-2035 | |
| 6 | Felipe Trujillo | 1858.1 | 2022-2025 | |
| 7 | Pat Sargent | 1845.2 | 2029-2031 | |
| 8 | Júlio Valentín | 1828.0 | 2019-2021 | |
| 9 | Shelby Loudenslager | 1827.0 | 2030-2032 | |
| 10 | Clark Calhoun | 1763.1 | 2020-2022 | |
| 11 | Alfredo Rivera | 1756.1 | 2021-2024 | |
| 12 | Francisco Guerra | 1723.0 | 2029-2030 | |
| 13 | Pedro Colón | 1708.2 | 2027-2029 | |
| 14 | Gilbert Graham | 1623.1 | 2022-2024 | |
| 15 | José Rico | 1621.1 | 2029-2030 | |
| 16 | Stephen Webb# | 1597.0 | 2031-2036 | |
| 17 | Leo Szilard | 1583.2 | 2028-2034 | |
| 18 | Alan Shaw# | 1565.0 | 2030-2034 | |
| 19 | Rubén Hernández | 1521.1 | 2025-2027 | |
| 20 | Alejandro Santiago | 1511.0 | 2028-2033 | |
| 21 | Lúcio Sánchez | 1438.2 | 2024-2025 | |
| 22 | Pat Lloyd# | 1406.1 | 2030-2034 | |
| 23 | Kip Burks | 1324.1 | 2020-2024 | |
| 24 | Brent van Schoonhoven | 1308.2 | 2023-2024 | |
| 25 | Shelby Noonan# | 1306.0 | 2028-2029 | |
| 26 | Natale Langushi | 1291.0 | 2024-2029 |
