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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Michael Machen# | 1.01 | 2029-2036 | |
| 2 | Carlos Sánchez | 1.02 | 2021-2028 | |
| 3 | Tim Powell | 1.05 | 2015-2020 | |
| 3 | Shigemasa Horiuchi | 1.05 | 2017-2031 | |
| 5 | Walt Coffman# | 1.10 | 2026-2035 | |
| 6 | Alexis Zambaco# | 1.13 | 2028-2037 | |
| 7 | Panda Montana# | 1.14 | 2029-2035 | |
| 8 | George Frazier# | 1.15 | 2017-2037 | |
| 9 | Gary Bailey | 1.16 | 2015-2032 | |
| 10 | Sexto Rodríguez | 1.17 | 2015-2025 | |
| 10 | Adrián Fierro | 1.17 | 2020-2034 | |
| 10 | Mark Collingwood# | 1.17 | 2031-2037 | |
| 13 | Armando Romano# | 1.18 | 2033-2037 | |
| 14 | Edison Larson# | 1.19 | 2020-2036 | |
| 15 | Will Hunting# | 1.21 | 2030-2037 | |
| 15 | Alfonso Zapata | 1.21 | 2022-2033 | |
| 15 | John Brown | 1.21 | 2017-2031 | |
| 18 | Art Adams | 1.23 | 2021-2030 | |
| 18 | William MacKnight | 1.23 | 2022-2028 | |
| 20 | Myles Wilkerson | 1.24 | 2026-2033 | |
| 20 | Cris Herrera | 1.24 | 2024-2034 | |
| 22 | Chip Bishop | 1.25 | 2015-2030 | |
| 22 | Lou Meadows | 1.25 | 2016-2029 | |
| 24 | Jeff Territt | 1.26 | 2020-2035 | |
| 25 | Shunen Takahashi | 1.28 | 2023-2035 | |
| 26 | Jon Briddon | 1.30 | 2022-2032 | |
| 26 | Rusty Swanson# | 1.30 | 2026-2035 | |
| 26 | Woody Carlson | 1.30 | 2020-2033 | |
| 26 | Matt Harris | 1.30 | 2020-2031 | |
| 26 | Zalontae Hillary# | 1.30 | 2031-2037 | |
| 31 | Quintiliano Seixal | 1.32 | 2025-2036 | |
| 31 | Manny Castro# | 1.32 | 2030-2037 | |
| 31 | Mal Houser# | 1.32 | 2029-2036 | |
| 34 | Alfonso Miranda | 1.33 | 2022-2031 | |
| 34 | Greg White | 1.33 | 2015-2028 | |
| 36 | Merlin Bassett# | 1.35 | 2029-2036 | |
| 36 | Ryan Peterson# | 1.35 | 2026-2036 | |
| 36 | Juan Montoya | 1.35 | 2025-2036 | |
| 39 | Roderick Rhodes | 1.36 | 2015-2030 | |
| 39 | José Alaniz | 1.36 | 2016-2030 | |
| 41 | Benny York | 1.38 | 2015-2029 | |
| 41 | Jared Cox | 1.38 | 2016-2022 | |
| 43 | Paul Lowery | 1.39 | 2015-2020 | |
| 44 | Kenshin Koike | 1.40 | 2018-2032 | |
| 45 | Leroy Moody | 1.41 | 2025-2032 | |
| 45 | David Collingwood | 1.41 | 2018-2031 | |
| 47 | Melvin Haney | 1.44 | 2023-2030 | |
| 47 | António Castillo# | 1.44 | 2027-2036 | |
| 49 | Yusuke Chikafuji | 1.48 | 2024-2032 | |
| 50 | Doug Green | 1.50 | 2022-2032 | |
| 50 | Gunner Hardy | 1.50 | 2016-2028 | |
| 52 | Collin Hill | 1.51 | 2020-2028 | |
| 53 | Christian Patrick | 1.54 | 2019-2028 | |
| 54 | Bob Compton | 1.62 | 2015-2023 |
