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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Leonard Puckett | 0.77 | 2001-2007 | |
| 2 | Rick Goulding | 0.98 | 2045-2052 | |
| 3 | Alfredo Molina | 1.08 | 2014-2018 | |
| 4 | Eric Roy | 1.12 | 2031-2034 | |
| 5 | Héctor Velásquez | 1.14 | 2002-2005 | |
| 6 | Axel Rolland | 1.17 | 2013-2019 | |
| 6 | Javier Carbajal | 1.17 | 2019-2030 | |
| 8 | Armando Jiménez | 1.21 | 2019-2024 | |
| 9 | Tommy Smith | 1.24 | 2018-2028 | |
| 9 | Nathan Turner | 1.24 | 2003-2008 | |
| 11 | Gilberto Morales | 1.26 | 2023-2028 | |
| 12 | Koji Shini | 1.28 | 2001-2005 | |
| 13 | Mike Condorcet | 1.29 | 1997-2002 | |
| 14 | Marcos Márquez | 1.36 | 2020-2024 | |
| 14 | Steven Nelson | 1.36 | 1997-2000 | |
| 16 | Jesús Coronado | 1.41 | 2017-2021 | |
| 17 | Barend van Eck | 1.52 | 2029-2035 | |
| 18 | Simon Woollams | 1.65 | 2032-2033 |
