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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | José Cabrera# | 1.29 | 2025-2028 | |
| 2 | R.J. Anderson | 1.33 | 2020-2027 | |
| 3 | Shawn Arnold# | 1.36 | 2015-2022 | |
| 4 | Steve Bryan# | 1.37 | 2019-2030 | |
| 4 | Carlos Peret# | 1.37 | 2025-2028 | |
| 6 | Pedro Romero | 1.38 | 2020-2026 | |
| 6 | Louis McDowell# | 1.38 | 2015-2030 | |
| 8 | Scott Mildren# | 1.42 | 2024-2027 | |
| 8 | Clay Clark | 1.42 | 2015-2018 | |
| 10 | Mark Tucker | 1.43 | 2017-2021 | |
| 11 | Jesús López | 1.47 | 2016-2023 | |
| 12 | António Fabián# | 1.48 | 2020-2028 | |
| 12 | Woo-suk Cho# | 1.48 | 2026-2030 | |
| 14 | Jeff Moore | 1.49 | 2020-2022 | |
| 15 | Homer O'Lannigan | 1.53 | 2018-2021 | |
| 16 | David Davis# | 1.55 | 2019-2030 | |
| 17 | Rob Smith# | 1.56 | 2018-2027 | |
| 17 | Bob McGhee# | 1.56 | 2015-2028 | |
| 19 | Eric Patnode | 1.57 | 2016-2025 | |
| 20 | Mike Barrett | 1.59 | 2022-2027 | |
| 20 | Josh Gardner | 1.59 | 2017-2021 | |
| 22 | William Bonner | 1.61 | 2020-2027 | |
| 22 | Travis Nelson# | 1.61 | 2024-2029 | |
| 24 | Brad Wilson | 1.65 | 2015-2021 |
