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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | IP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Shunso Kono | 4848.1 | 2015-2021 | |
| 2 | Mitsuzuka Kobayashi | 3730.0 | 2013-2017 | |
| 3 | Ramón Vela | 3292.2 | 2021-2025 | |
| 4 | Pramana Djajadiningrat | 2777.1 | 2022-2027 | |
| 5 | Vinnie Errichiello# | 2640.1 | 2031-2034 | |
| 6 | Daniel Guillén | 2614.2 | 2015-2018 | |
| 7 | António Costello | 2556.0 | 2017-2023 | |
| 8 | Jeremy Guis# | 2532.1 | 2024-2027 | |
| 9 | Jorge Hernández | 2355.0 | 2018-2022 | |
| 10 | Brad Shanahan | 2339.1 | 2019-2028 | |
| 11 | Tony Baird | 2293.0 | 2017-2020 | |
| 12 | Dan Harris | 2277.1 | 2013-2015 | |
| 13 | Travis Hickey# | 2262.2 | 2032-2034 | |
| 14 | Mamoru Nemoto | 2245.1 | 2016-2024 | |
| 15 | Tetsuhiro Morita# | 2234.2 | 2031-2034 | |
| 16 | Hsui-chen Shui# | 2198.2 | 2023-2026 | |
| 17 | David Baker | 2190.0 | 2012-2014 | |
| 18 | Ryosei Nakanishi | 2147.2 | 2012-2013 | |
| 19 | Satoshi Kuhabara | 2115.2 | 2016-2025 | |
| 20 | Danny Rodriguez# | 2093.1 | 2030-2034 | |
| 21 | Toshinobu Noro | 2090.0 | 2017-2023 | |
| 22 | Richard Hutcheon | 2077.2 | 2025-2028 | |
| 23 | Yoshiki Sasaki | 2067.2 | 2014-2016 | |
| 24 | Casey Freemann# | 2066.2 | 2023-2026 | |
| 25 | Ricardo Díaz# | 2049.0 | 2025-2032 | |
| 26 | Ryan Cunningham# | 2047.2 | 2031-2032 | |
| 27 | Marcus Sadler | 2042.2 | 2019-2021 | |
| 28 | Pedro Ornelas | 2035.0 | 2013-2020 | |
| 29 | Salvador Álvarez | 2011.1 | 2020-2026 | |
| 30 | Chang-yong Zhang | 2004.2 | 2021-2023 |
