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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Wilson Vélez# | 1.26 | 2016-2022 | |
| 2 | José Cabrera# | 1.29 | 2025-2028 | |
| 3 | R.J. Anderson# | 1.33 | 2020-2027 | |
| 4 | Louis McDowell# | 1.34 | 2015-2028 | |
| 5 | César González# | 1.36 | 2021-2023 | |
| 5 | Shawn Arnold# | 1.36 | 2015-2022 | |
| 7 | Carlos Peret# | 1.37 | 2025-2028 | |
| 8 | Pedro Romero | 1.38 | 2020-2026 | |
| 9 | Tom Hernández | 1.41 | 2016-2021 | |
| 10 | Cisco Romero | 1.42 | 2019-2022 | |
| 10 | Scott Mildren# | 1.42 | 2024-2027 | |
| 10 | Jorge Carrión# | 1.42 | 2022-2026 | |
| 10 | Clay Clark | 1.42 | 2015-2018 | |
| 14 | Mark Tucker# | 1.43 | 2017-2021 | |
| 15 | Homer Shafer | 1.44 | 2015-2020 | |
| 16 | Alonso Rodríguez | 1.45 | 2015-2019 | |
| 16 | Alex Simmons | 1.45 | 2017-2024 | |
| 18 | Javier Roldán# | 1.46 | 2019-2023 | |
| 19 | Jesús López | 1.47 | 2016-2023 | |
| 19 | Júlio Palácios | 1.47 | 2021-2026 | |
| 21 | António Fabián# | 1.48 | 2020-2028 | |
| 22 | Jeff Moore | 1.49 | 2020-2022 | |
| 23 | King Fletcher# | 1.50 | 2020-2023 | |
| 24 | David Davis# | 1.52 | 2019-2028 | |
| 25 | Marc Graham | 1.53 | 2020-2022 | |
| 25 | Homer O'Lannigan | 1.53 | 2018-2021 | |
| 27 | Rob Smith# | 1.56 | 2018-2027 | |
| 27 | Bob McGhee# | 1.56 | 2015-2028 | |
| 29 | Eric Patnode | 1.57 | 2016-2025 | |
| 30 | Anthony Hanover# | 1.58 | 2016-2020 | |
| 31 | Mike Barrett | 1.59 | 2022-2027 | |
| 31 | Josh Gardner | 1.59 | 2017-2021 | |
| 33 | José Rodríguez | 1.60 | 2015-2019 | |
| 34 | William Bonner# | 1.61 | 2020-2027 | |
| 35 | Peter Hall# | 1.63 | 2024-2028 | |
| 35 | Travis Nelson# | 1.63 | 2024-2028 | |
| 37 | Brad Wilson | 1.65 | 2015-2021 |
