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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 | 2029-2041 | |
| 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 | Holden Rosen Grupp# | 1.13 | 2030-2042 | |
| 7 | Alexis Zambaco# | 1.15 | 2028-2040 | |
| 7 | Armando Romano# | 1.15 | 2033-2038 | |
| 7 | George Frazier | 1.15 | 2017-2037 | |
| 10 | Gary Bailey | 1.16 | 2015-2032 | |
| 11 | Sexto Rodríguez | 1.17 | 2015-2025 | |
| 11 | Adrián Fierro | 1.17 | 2020-2034 | |
| 11 | Hermenegildo Beliago# | 1.17 | 2027-2042 | |
| 14 | Panda Montana | 1.19 | 2029-2041 | |
| 14 | Will Hunting# | 1.19 | 2030-2042 | |
| 16 | Ron Manning# | 1.20 | 2029-2042 | |
| 17 | Alfonso Zapata | 1.21 | 2022-2033 | |
| 17 | Neil Franson | 1.21 | 2030-2042 | |
| 17 | John Brown | 1.21 | 2017-2031 | |
| 20 | Art Adams | 1.23 | 2021-2030 | |
| 20 | William MacKnight | 1.23 | 2022-2028 | |
| 22 | Myles Wilkerson | 1.24 | 2026-2033 | |
| 22 | Mark Collingwood | 1.24 | 2031-2041 | |
| 22 | Cris Herrera | 1.24 | 2024-2034 | |
| 25 | Chip Bishop | 1.25 | 2015-2030 | |
| 25 | Lou Meadows | 1.25 | 2016-2029 | |
| 25 | Nolan Howard# | 1.25 | 2034-2041 | |
| 28 | Roman Phansalker# | 1.26 | 2038-2042 | |
| 28 | Jeff Territt | 1.26 | 2020-2035 | |
| 28 | Edison Larson | 1.26 | 2020-2039 | |
| 31 | Shunen Takahashi | 1.28 | 2023-2035 | |
| 32 | Javier Desdin# | 1.29 | 2026-2042 | |
| 32 | Pete Rhue# | 1.29 | 2032-2040 | |
| 32 | Rod Watts# | 1.29 | 2037-2042 | |
| 32 | Zalontae Hillary# | 1.29 | 2031-2038 | |
| 36 | Jon Briddon | 1.30 | 2022-2032 | |
| 36 | Rusty Swanson | 1.30 | 2026-2035 | |
| 36 | Woody Carlson | 1.30 | 2020-2033 | |
| 36 | Matt Harris | 1.30 | 2020-2031 | |
| 40 | Marvin Martin | 1.31 | 2025-2041 | |
| 41 | Quintiliano Seixal | 1.32 | 2025-2036 | |
| 41 | Román Mejía# | 1.32 | 2034-2042 | |
| 41 | Manny Castro | 1.32 | 2030-2037 | |
| 41 | Mal Houser# | 1.32 | 2029-2038 | |
| 45 | Alfonso Miranda | 1.33 | 2022-2031 | |
| 45 | Greg White | 1.33 | 2015-2028 | |
| 45 | Luis Díaz# | 1.33 | 2033-2042 | |
| 48 | José Ruíz# | 1.34 | 2035-2040 | |
| 48 | Masahiro Sakei | 1.34 | 2035-2041 | |
| 50 | Ryan Peterson | 1.35 | 2026-2036 | |
| 50 | Juan Montoya | 1.35 | 2025-2036 | |
| 50 | Shawn Williams | 1.35 | 2030-2040 | |
| 53 | Roderick Rhodes | 1.36 | 2015-2030 | |
| 53 | Robbie Betchley | 1.36 | 2030-2040 | |
| 53 | José Alaniz | 1.36 | 2016-2030 | |
| 56 | Domingo Ramírez | 1.37 | 2023-2040 | |
| 57 | Benny York | 1.38 | 2015-2029 | |
| 57 | Merlin Bassett | 1.38 | 2029-2038 | |
| 57 | Jared Cox | 1.38 | 2016-2022 | |
| 60 | Paul Lowery | 1.39 | 2015-2020 | |
| 61 | Kenshin Koike | 1.40 | 2018-2032 | |
| 62 | Leroy Moody | 1.41 | 2025-2032 | |
| 62 | David Collingwood | 1.41 | 2018-2031 | |
| 64 | Melvin Haney | 1.44 | 2023-2030 | |
| 65 | António Castillo | 1.45 | 2027-2038 | |
| 66 | 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 | Harry Stuterberg# | 1.53 | 2034-2040 | |
| 71 | Christian Patrick | 1.54 | 2019-2028 | |
| 72 | Bob Compton | 1.62 | 2015-2023 |
