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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | IP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Matt Hartnett | 3750.2 | 2022-2026 | |
| 2 | Cristo Ramírez | 2564.1 | 2020-2024 | |
| 3 | Hideki Hisanobu | 2367.2 | 2028-2035 | |
| 4 | Carlos Rúbio | 2235.2 | 2031-2038 | |
| 5 | José Castillo | 2045.0 | 2028-2033 | |
| 6 | Ignacio Medine | 1950.1 | 2027-2029 | |
| 7 | Jin-song Seah | 1828.0 | 2033-2037 | |
| 8 | Jon Moon# | 1826.1 | 2037-2040 | |
| 9 | Lev Migranov | 1814.1 | 2034-2039 | |
| 10 | Barry Martínez | 1797.0 | 2016-2024 | |
| 11 | Jouo Hirschovits | 1788.0 | 2035-2037 | |
| 12 | Phil Oostermeer | 1709.2 | 2033-2040 | |
| 13 | Cosmo Bjorkenheim | 1691.0 | 2030-2037 | |
| 14 | Xu Cheng# | 1676.2 | 2032-2039 | |
| 15 | Álex Estrada | 1637.2 | 2024-2030 | |
| 16 | Alfredo García | 1586.1 | 2026-2031 | |
| 17 | Toyokazu Oshima | 1577.2 | 2035-2038 | |
| 18 | Arturo Maldonado | 1575.2 | 2026-2029 | |
| 19 | Jim Harris | 1556.1 | 2018-2023 | |
| 20 | Mike Lipide | 1517.2 | 2030-2035 | |
| 21 | Alan McLennan | 1512.0 | 2032-2034 | |
| 22 | Jason DeGeorge | 1510.1 | 2030-2033 | |
| 23 | Sergio Cruz# | 1498.1 | 2035-2039 | |
| 24 | Luis Vicenteno | 1454.2 | 2026-2029 | |
| 25 | Joe Karnowski | 1394.0 | 2038-2041 | |
| 26 | Alistair Mix | 1373.1 | 2031-2032 | |
| 27 | Augusto Rocha | 1371.1 | 2022-2030 | |
| 28 | Mike Gillespie | 1356.0 | 2029-2032 | |
| 29 | Alex Maxwell | 1347.0 | 2026-2028 | |
| 30 | Pedro Hernández | 1342.1 | 2032-2037 | |
| 31 | Ted Striker | 1332.2 | 2030-2032 | |
| 32 | Ramón Félix | 1322.1 | 2025-2032 | |
| 33 | Miguel Uribe | 1304.1 | 2024-2030 | |
| 34 | Michael Landry | 1255.1 | 2023-2028 | |
| 35 | Víctor Cuevas# | 1251.0 | 2037-2039 |
