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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Roy Robinson | 0.85 | 2013-2023 | |
| 2 | Ralph McKinney# | 0.92 | 2019-2028 | |
| 3 | Ken Hinkle | 0.97 | 2013-2026 | |
| 4 | Sozen Raikatuji | 1.00 | 2016-2023 | |
| 5 | Pedro Alejándrez# | 1.02 | 2021-2028 | |
| 6 | Jorge Aguirre# | 1.03 | 2015-2028 | |
| 6 | Todd Hines# | 1.03 | 2018-2028 | |
| 8 | Guillermo García | 1.04 | 2013-2021 | |
| 9 | Devin Hinton | 1.05 | 2013-2023 | |
| 10 | Jesús Gonzáles# | 1.07 | 2019-2028 | |
| 10 | Ryan Ray | 1.07 | 2013-2021 | |
| 12 | John Wilkins# | 1.09 | 2013-2028 | |
| 12 | Bruce Wright# | 1.09 | 2020-2028 | |
| 12 | Lúcio Sánchez# | 1.09 | 2017-2028 | |
| 12 | Edwin Ellis | 1.09 | 2013-2019 | |
| 12 | John Dempsey# | 1.09 | 2022-2028 | |
| 17 | Ryan Davis | 1.10 | 2015-2026 | |
| 17 | Yoriyoshi Yamamoto | 1.10 | 2016-2026 | |
| 17 | António Vega | 1.10 | 2013-2023 | |
| 20 | Jesús Caldero# | 1.11 | 2018-2027 | |
| 20 | Jim Eliott | 1.11 | 2014-2025 | |
| 20 | Cordell Wilson# | 1.11 | 2019-2028 | |
| 23 | Gene Kirkland# | 1.12 | 2018-2028 | |
| 23 | José Hernández | 1.12 | 2013-2023 | |
| 23 | Yuri Volkers | 1.12 | 2013-2021 | |
| 23 | Ramón Ortega# | 1.12 | 2013-2028 | |
| 23 | Alec Pittman# | 1.12 | 2016-2028 | |
| 28 | Tom Reynolds# | 1.13 | 2015-2028 | |
| 29 | Raúl Areola# | 1.15 | 2020-2028 | |
| 29 | Vincent Hall# | 1.15 | 2020-2027 | |
| 29 | John Kaufman# | 1.15 | 2017-2028 | |
| 32 | Ole Kos | 1.16 | 2018-2027 | |
| 32 | Eduardo Díaz# | 1.16 | 2021-2028 | |
| 34 | Wayne Craig# | 1.17 | 2018-2028 | |
| 34 | Fraser Cuevas# | 1.17 | 2020-2028 | |
| 36 | Javier Ramírez | 1.18 | 2018-2027 | |
| 37 | Adrián Fierro# | 1.19 | 2018-2026 | |
| 37 | John Coleman | 1.19 | 2013-2025 | |
| 37 | Curtis Fields | 1.19 | 2016-2024 | |
| 37 | Burt Booth | 1.19 | 2013-2026 | |
| 37 | Edgardo Marín# | 1.19 | 2013-2028 | |
| 37 | Cris Mendoza# | 1.19 | 2013-2028 | |
| 37 | Chester Henry | 1.19 | 2016-2023 | |
| 37 | Kyle Lewis | 1.19 | 2016-2026 | |
| 45 | Juan Júlio | 1.21 | 2013-2026 | |
| 45 | Bill Oulton# | 1.21 | 2021-2028 | |
| 47 | Enrique Cortéz# | 1.22 | 2022-2027 | |
| 47 | Bartolomeu Lio# | 1.22 | 2018-2028 | |
| 47 | Kirby Buckner# | 1.22 | 2025-2028 | |
| 50 | Manuel Rojas# | 1.23 | 2018-2028 | |
| 50 | Makoto Kato# | 1.23 | 2019-2024 | |
| 50 | Wayne Hurst# | 1.23 | 2015-2024 | |
| 53 | Juan Gusmán# | 1.24 | 2024-2028 | |
| 53 | Carlos Mata | 1.24 | 2018-2021 | |
| 53 | Bill Grange | 1.24 | 2013-2017 | |
| 53 | Earnest Casey | 1.24 | 2018-2025 | |
| 53 | Pat Farrell | 1.24 | 2013-2022 | |
| 58 | George Frazier# | 1.25 | 2019-2027 | |
| 58 | Kirby Brown# | 1.25 | 2017-2028 | |
| 58 | Luis Flores# | 1.25 | 2024-2028 | |
| 61 | Bill Fletcher# | 1.26 | 2018-2025 | |
| 62 | Billy Crawford | 1.27 | 2014-2025 | |
| 63 | Josef van der Poel# | 1.28 | 2019-2028 | |
| 63 | Miguel Castillo | 1.28 | 2013-2020 | |
| 63 | Enrique Magana | 1.28 | 2013-2019 | |
| 66 | Juan Torres# | 1.29 | 2023-2028 | |
| 66 | William Johnson | 1.29 | 2013-2018 | |
| 68 | Juan Pérez# | 1.30 | 2020-2028 | |
| 69 | Peter Rivers | 1.31 | 2013-2020 | |
| 70 | Reid Garner | 1.32 | 2015-2022 | |
| 71 | Christian Bates | 1.33 | 2019-2022 | |
| 71 | Clancy McKinney# | 1.33 | 2023-2028 | |
| 73 | José Flores# | 1.35 | 2019-2028 | |
| 74 | Pedro Martínez | 1.36 | 2013-2017 | |
| 75 | Pedro Ritodíaz | 1.37 | 2013-2024 | |
| 76 | Yin-fat Foong# | 1.38 | 2017-2027 | |
| 77 | Vern Camp | 1.40 | 2013-2022 | |
| 78 | Pedro Ramírez# | 1.42 | 2023-2028 | |
| 79 | Cole Hall | 1.43 | 2013-2027 | |
| 79 | Ilie Paunescu# | 1.43 | 2016-2028 | |
| 81 | Michael Battle | 1.44 | 2014-2024 | |
| 81 | Marshall Edwards | 1.44 | 2013-2022 | |
| 83 | Mario Peńa | 1.45 | 2013-2023 | |
| 83 | Christian Pitts | 1.45 | 2015-2025 | |
| 85 | Edgar Martínez | 1.47 | 2013-2021 | |
| 86 | Kaluka Wene# | 1.52 | 2016-2028 | |
| 86 | Chris Rogers# | 1.52 | 2015-2027 | |
| 88 | Masood Thind | 1.59 | 2014-2018 | |
| 89 | Armando Hernández | 1.70 | 2013-2018 |
