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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Michael Machen# | 0.99 | 2029-2032 | |
| 2 | Carlos Sánchez# | 1.02 | 2021-2028 | |
| 3 | Walt Coffman# | 1.04 | 2026-2029 | |
| 4 | Tim Powell | 1.05 | 2015-2020 | |
| 4 | Shigemasa Horiuchi# | 1.05 | 2017-2031 | |
| 6 | Pat Farrell | 1.06 | 2015-2023 | |
| 7 | Panda Montana# | 1.10 | 2029-2032 | |
| 8 | Javier Castillo# | 1.12 | 2024-2032 | |
| 8 | Addie Samson# | 1.12 | 2024-2027 | |
| 10 | Pedro Ritodíaz | 1.13 | 2015-2024 | |
| 11 | Luis Peña# | 1.14 | 2025-2032 | |
| 11 | Ron Manning# | 1.14 | 2029-2032 | |
| 13 | Edison Larson# | 1.15 | 2020-2029 | |
| 13 | Alexis Zambaco# | 1.15 | 2028-2032 | |
| 13 | Adrián Fierro# | 1.15 | 2020-2032 | |
| 13 | George Frazier# | 1.15 | 2017-2032 | |
| 17 | Gary Bailey | 1.16 | 2015-2032 | |
| 17 | Alfonso Zapata# | 1.16 | 2022-2025 | |
| 19 | Sexto Rodríguez | 1.17 | 2015-2025 | |
| 20 | Eduardo Molina# | 1.20 | 2022-2025 | |
| 21 | Cris Herrera# | 1.21 | 2024-2032 | |
| 21 | John Brown | 1.21 | 2017-2031 | |
| 23 | Jeff Territt# | 1.22 | 2020-2030 | |
| 24 | Art Adams# | 1.23 | 2021-2030 | |
| 24 | William MacKnight# | 1.23 | 2022-2028 | |
| 24 | Lorenzo Sánchez# | 1.23 | 2020-2029 | |
| 27 | Chip Bishop | 1.25 | 2015-2030 | |
| 27 | Johnny Joyce | 1.25 | 2015-2019 | |
| 27 | Lou Meadows | 1.25 | 2016-2029 | |
| 27 | Myles Wilkerson# | 1.25 | 2026-2032 | |
| 31 | Rusty Swanson# | 1.26 | 2026-2029 | |
| 32 | Shunen Takahashi# | 1.28 | 2023-2030 | |
| 33 | Dan Mitchell# | 1.29 | 2020-2025 | |
| 33 | John Alvarado | 1.29 | 2017-2021 | |
| 33 | Woody Carlson# | 1.29 | 2020-2032 | |
| 36 | Mathies Pilegaard | 1.30 | 2015-2025 | |
| 36 | Jon Briddon# | 1.30 | 2022-2032 | |
| 36 | Jesús Tejeda# | 1.30 | 2023-2032 | |
| 36 | Matt Harris | 1.30 | 2020-2031 | |
| 40 | Neil Gilliam | 1.31 | 2021-2026 | |
| 41 | Austin Stewart | 1.32 | 2022-2030 | |
| 42 | Alfonso Miranda# | 1.33 | 2022-2031 | |
| 42 | Greg White | 1.33 | 2015-2028 | |
| 42 | Juan Montoya# | 1.33 | 2025-2031 | |
| 45 | Ryan Peterson# | 1.35 | 2026-2030 | |
| 46 | Jorge Castillo | 1.36 | 2020-2030 | |
| 46 | Roderick Rhodes | 1.36 | 2015-2030 | |
| 46 | José Alaniz# | 1.36 | 2016-2030 | |
| 49 | António Cruz | 1.37 | 2015-2020 | |
| 50 | Benny York | 1.38 | 2015-2029 | |
| 50 | Ronald Harmon | 1.38 | 2016-2029 | |
| 50 | Jared Cox | 1.38 | 2016-2022 | |
| 53 | Paul Lowery | 1.39 | 2015-2020 | |
| 53 | Roger Garrett | 1.39 | 2016-2024 | |
| 55 | Kenshin Koike | 1.40 | 2018-2032 | |
| 56 | Leroy Moody# | 1.41 | 2025-2032 | |
| 56 | David Collingwood# | 1.41 | 2018-2031 | |
| 58 | Jim Roberts | 1.42 | 2016-2020 | |
| 59 | Melvin Haney# | 1.44 | 2023-2030 | |
| 60 | António Castillo# | 1.45 | 2027-2032 | |
| 61 | José Guzmán# | 1.47 | 2024-2032 | |
| 61 | Leroy Picot | 1.47 | 2025-2032 | |
| 61 | Félix Jiménez | 1.47 | 2022-2026 | |
| 64 | Leslie Brooks | 1.48 | 2021-2030 | |
| 64 | Bobby Swain# | 1.48 | 2024-2032 | |
| 64 | Yusuke Chikafuji# | 1.48 | 2024-2032 | |
| 67 | Doug Green# | 1.50 | 2022-2032 | |
| 67 | Gunner Hardy | 1.50 | 2016-2028 | |
| 69 | Collin Hill# | 1.51 | 2020-2028 | |
| 70 | Christian Patrick | 1.54 | 2019-2028 | |
| 71 | Elvin Brooks | 1.60 | 2017-2028 | |
| 72 | Kent Hubbard | 1.61 | 2015-2020 | |
| 73 | Bob Compton | 1.62 | 2015-2023 |
