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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Carlos Sánchez# | 1.02 | 2021-2028 | |
| 2 | Shigemasa Horiuchi# | 1.04 | 2017-2029 | |
| 2 | Walt Coffman# | 1.04 | 2026-2029 | |
| 4 | Tim Powell | 1.05 | 2015-2020 | |
| 5 | Pat Farrell | 1.06 | 2015-2023 | |
| 6 | Tetsuzan Kaneko | 1.08 | 2018-2025 | |
| 7 | Harrison Jones | 1.10 | 2017-2021 | |
| 8 | Addie Samson# | 1.12 | 2024-2027 | |
| 9 | Luis Peña# | 1.13 | 2025-2029 | |
| 9 | Pedro Ritodíaz | 1.13 | 2015-2024 | |
| 11 | Edison Larson# | 1.15 | 2020-2029 | |
| 12 | Gary Bailey# | 1.16 | 2015-2029 | |
| 12 | Alfonso Zapata# | 1.16 | 2022-2025 | |
| 14 | Sexto Rodríguez | 1.17 | 2015-2025 | |
| 15 | Roberto Calderón# | 1.18 | 2026-2029 | |
| 16 | Jeff Territt# | 1.20 | 2020-2029 | |
| 16 | Eduardo Molina# | 1.20 | 2022-2025 | |
| 16 | John Brown# | 1.20 | 2017-2029 | |
| 19 | Chip Bishop# | 1.22 | 2015-2029 | |
| 19 | Cris Herrera# | 1.22 | 2024-2029 | |
| 19 | Dave Tomlinson | 1.22 | 2017-2026 | |
| 22 | Dave Goode | 1.23 | 2019-2025 | |
| 22 | Hunter Wilson# | 1.23 | 2022-2027 | |
| 22 | William MacKnight# | 1.23 | 2022-2028 | |
| 22 | Lorenzo Sánchez# | 1.23 | 2020-2029 | |
| 22 | Matt Harris# | 1.23 | 2020-2029 | |
| 27 | Art Adams# | 1.24 | 2021-2029 | |
| 28 | Johnny Joyce | 1.25 | 2015-2019 | |
| 28 | Lou Meadows# | 1.25 | 2016-2029 | |
| 28 | Shunen Takahashi# | 1.25 | 2023-2029 | |
| 31 | Rusty Swanson# | 1.26 | 2026-2029 | |
| 32 | Jeff Bradshaw# | 1.28 | 2024-2029 | |
| 32 | Sukejuro Yokoyama# | 1.28 | 2025-2027 | |
| 34 | Jon Briddon# | 1.29 | 2022-2029 | |
| 34 | Dan Mitchell# | 1.29 | 2020-2025 | |
| 34 | Kent Clement# | 1.29 | 2021-2029 | |
| 34 | John Alvarado | 1.29 | 2017-2021 | |
| 38 | Mathies Pilegaard | 1.30 | 2015-2025 | |
| 38 | Jesús Tejeda# | 1.30 | 2023-2027 | |
| 38 | Roderick Rhodes# | 1.30 | 2015-2029 | |
| 38 | Henry Hall# | 1.30 | 2017-2025 | |
| 42 | Woody Carlson# | 1.31 | 2020-2027 | |
| 42 | Neil Gilliam# | 1.31 | 2021-2026 | |
| 44 | Ryan Peterson# | 1.32 | 2026-2029 | |
| 45 | Roderick Draper | 1.33 | 2015-2021 | |
| 45 | Cipriano Costa# | 1.33 | 2022-2026 | |
| 45 | Greg White# | 1.33 | 2015-2028 | |
| 45 | Cisco Cruz | 1.33 | 2017-2025 | |
| 45 | Doug Green# | 1.33 | 2022-2029 | |
| 50 | Alfonso Miranda# | 1.34 | 2022-2029 | |
| 50 | Austin Stewart# | 1.34 | 2022-2029 | |
| 50 | Jorge Castillo# | 1.34 | 2020-2025 | |
| 53 | Juan Montoya# | 1.35 | 2025-2029 | |
| 54 | José Alaniz# | 1.36 | 2016-2025 | |
| 55 | António Cruz | 1.37 | 2015-2020 | |
| 55 | Antonio Godfrey# | 1.37 | 2024-2028 | |
| 57 | Benny York# | 1.38 | 2015-2029 | |
| 57 | Ronald Harmon# | 1.38 | 2016-2029 | |
| 57 | Jared Cox | 1.38 | 2016-2022 | |
| 60 | Paul Lowery | 1.39 | 2015-2020 | |
| 60 | Luis Hernández# | 1.39 | 2025-2029 | |
| 60 | Roger Garrett | 1.39 | 2016-2024 | |
| 60 | Kenshin Koike# | 1.39 | 2018-2027 | |
| 64 | Clarence Ramsey | 1.40 | 2017-2022 | |
| 64 | Yusuke Chikafuji# | 1.40 | 2024-2029 | |
| 64 | David Collingwood# | 1.40 | 2018-2028 | |
| 67 | Jim Roberts | 1.42 | 2016-2020 | |
| 68 | Guillermo Pérez | 1.43 | 2017-2025 | |
| 68 | Leroy Moody# | 1.43 | 2025-2029 | |
| 68 | Chuck Steele | 1.43 | 2018-2024 | |
| 71 | Leroy Picot# | 1.44 | 2025-2029 | |
| 71 | José Guzmán# | 1.44 | 2024-2027 | |
| 71 | Melvin Haney# | 1.44 | 2023-2029 | |
| 74 | Ryan McCall# | 1.47 | 2019-2022 | |
| 74 | Félix Jiménez# | 1.47 | 2022-2026 | |
| 76 | Leslie Brooks# | 1.48 | 2021-2029 | |
| 77 | Gunner Hardy# | 1.50 | 2016-2028 | |
| 77 | Bobby Swain# | 1.50 | 2024-2029 | |
| 79 | Collin Hill# | 1.51 | 2020-2028 | |
| 80 | Christian Patrick | 1.54 | 2019-2028 | |
| 81 | Mike Jones | 1.55 | 2016-2020 | |
| 81 | Britt Yates | 1.55 | 2016-2023 | |
| 83 | Elvin Brooks# | 1.60 | 2017-2028 | |
| 84 | Reynaldo Ortíz# | 1.61 | 2022-2027 | |
| 84 | Mike Franklin | 1.61 | 2015-2019 | |
| 84 | Kent Hubbard | 1.61 | 2015-2020 | |
| 87 | Bob Compton | 1.62 | 2015-2023 | |
| 88 | Glenn West | 1.66 | 2020-2025 | |
| 89 | Ryan Draper | 1.84 | 2020-2024 | |
| 89 | Bartolo González | 1.84 | 2015-2019 |
