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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Michael Machen# | 1.00 | 2029-2034 | |
| 2 | Carlos Sánchez# | 1.02 | 2021-2028 | |
| 3 | Tim Powell | 1.05 | 2015-2020 | |
| 3 | Shigemasa Horiuchi | 1.05 | 2017-2031 | |
| 5 | Walt Coffman# | 1.06 | 2026-2034 | |
| 6 | Alexis Zambaco# | 1.12 | 2028-2034 | |
| 7 | Panda Montana# | 1.13 | 2029-2034 | |
| 7 | Pedro Ritodíaz | 1.13 | 2015-2024 | |
| 7 | Addie Samson# | 1.13 | 2024-2034 | |
| 10 | Luis Peña# | 1.14 | 2025-2032 | |
| 11 | Mark Collingwood# | 1.15 | 2031-2034 | |
| 11 | Edison Larson# | 1.15 | 2020-2029 | |
| 11 | George Frazier# | 1.15 | 2017-2032 | |
| 14 | Gary Bailey | 1.16 | 2015-2032 | |
| 15 | Sexto Rodríguez | 1.17 | 2015-2025 | |
| 15 | Adrián Fierro | 1.17 | 2020-2034 | |
| 17 | Will Hunting# | 1.19 | 2030-2034 | |
| 18 | Eduardo Molina# | 1.20 | 2022-2033 | |
| 19 | Alfonso Zapata# | 1.21 | 2022-2033 | |
| 19 | John Brown | 1.21 | 2017-2031 | |
| 21 | Jeff Territt# | 1.22 | 2020-2030 | |
| 22 | Art Adams | 1.23 | 2021-2030 | |
| 22 | William MacKnight# | 1.23 | 2022-2028 | |
| 22 | Prince Michael Jackson# | 1.23 | 2029-2033 | |
| 22 | Lorenzo Sánchez# | 1.23 | 2020-2029 | |
| 26 | Myles Wilkerson# | 1.24 | 2026-2033 | |
| 26 | Manny Castro# | 1.24 | 2030-2034 | |
| 26 | Cris Herrera# | 1.24 | 2024-2034 | |
| 29 | Chip Bishop | 1.25 | 2015-2030 | |
| 29 | Johnny Joyce | 1.25 | 2015-2019 | |
| 29 | Lou Meadows | 1.25 | 2016-2029 | |
| 32 | Shunen Takahashi# | 1.28 | 2023-2030 | |
| 33 | Dan Mitchell | 1.29 | 2020-2025 | |
| 33 | John Alvarado | 1.29 | 2017-2021 | |
| 35 | Mathies Pilegaard | 1.30 | 2015-2025 | |
| 35 | Jon Briddon# | 1.30 | 2022-2032 | |
| 35 | Woody Carlson# | 1.30 | 2020-2033 | |
| 35 | Matt Harris | 1.30 | 2020-2031 | |
| 35 | Rusty Swanson# | 1.30 | 2026-2034 | |
| 40 | Mal Houser# | 1.31 | 2029-2034 | |
| 40 | Jesús Tejeda# | 1.31 | 2023-2033 | |
| 40 | Quintiliano Seixal# | 1.31 | 2025-2033 | |
| 43 | Merlin Bassett# | 1.32 | 2029-2034 | |
| 43 | Austin Stewart | 1.32 | 2022-2030 | |
| 45 | Alfonso Miranda | 1.33 | 2022-2031 | |
| 45 | Greg White | 1.33 | 2015-2028 | |
| 45 | Juan Montoya# | 1.33 | 2025-2031 | |
| 45 | Juan Díaz# | 1.33 | 2030-2034 | |
| 49 | Ryan Peterson# | 1.35 | 2026-2034 | |
| 50 | Roderick Rhodes | 1.36 | 2015-2030 | |
| 50 | José Alaniz | 1.36 | 2016-2030 | |
| 52 | Sukejuro Yokoyama# | 1.38 | 2025-2033 | |
| 52 | Benny York | 1.38 | 2015-2029 | |
| 52 | Ronald Harmon | 1.38 | 2016-2029 | |
| 52 | Jared Cox | 1.38 | 2016-2022 | |
| 56 | Paul Lowery | 1.39 | 2015-2020 | |
| 56 | Roger Garrett | 1.39 | 2016-2024 | |
| 58 | Kenshin Koike | 1.40 | 2018-2032 | |
| 59 | Leroy Moody# | 1.41 | 2025-2032 | |
| 59 | David Collingwood | 1.41 | 2018-2031 | |
| 61 | Jim Roberts | 1.42 | 2016-2020 | |
| 62 | Melvin Haney# | 1.44 | 2023-2030 | |
| 63 | António Castillo# | 1.45 | 2027-2033 | |
| 64 | José Guzmán# | 1.47 | 2024-2032 | |
| 64 | Félix Jiménez | 1.47 | 2022-2026 | |
| 66 | Bobby Swain | 1.48 | 2024-2032 | |
| 66 | Yusuke Chikafuji# | 1.48 | 2024-2032 | |
| 68 | Doug Green | 1.50 | 2022-2032 | |
| 68 | Gunner Hardy | 1.50 | 2016-2028 | |
| 70 | Collin Hill | 1.51 | 2020-2028 | |
| 71 | Christian Patrick | 1.54 | 2019-2028 | |
| 72 | Elvin Brooks | 1.60 | 2017-2028 | |
| 73 | Kent Hubbard | 1.61 | 2015-2020 | |
| 74 | Bob Compton | 1.62 | 2015-2023 |
