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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Ryan Feierabend | 1.34 | 2007-2014 | |
| 1 | Nathan Eovaldi# | 1.34 | 2013-2015 | |
| 3 | Brent Honeywell Jr.# | 1.40 | 2018-2020 | |
| 4 | Luke Weaver# | 1.43 | 2017-2024 | |
| 5 | Braden Shipley | 1.46 | 2017-2024 | |
| 5 | Scott Diamond | 1.46 | 2013-2021 | |
| 5 | Osvaldo Bido# | 1.46 | 2022-2026 | |
| 8 | Jose De Leon# | 1.48 | 2017-2025 | |
| 9 | Clayton Richard | 1.49 | 2013-2017 | |
| 10 | Kwang-hyun Kim# | 1.50 | 2023-2026 | |
| 11 | Mitch White# | 1.51 | 2019-2023 | |
| 12 | Mike Wright | 1.53 | 2015-2024 | |
| 13 | Humberto Mejia# | 1.54 | 2022-2025 | |
| 13 | Allen Webster | 1.54 | 2013-2021 | |
| 15 | Brad Mills | 1.55 | 2013-2017 | |
| 15 | Lucas Harrell | 1.55 | 2013-2018 | |
| 17 | Ross Detwiler | 1.57 | 2014-2024 | |
| 17 | Paolo Espino# | 1.57 | 2016-2025 | |
| 19 | Brandon Cumpton | 1.58 | 2014-2019 | |
| 19 | Brett Kennedy# | 1.58 | 2019-2023 | |
| 21 | Rob Scahill | 1.59 | 2013-2019 | |
| 21 | Felix Doubront | 1.59 | 2016-2019 | |
| 23 | Burch Smith | 1.61 | 2016-2022 | |
| 24 | Kolby Allard# | 1.65 | 2018-2021 | |
| 24 | Brooks Raley# | 1.65 | 2014-2024 | |
| 26 | Dillon Overton | 1.69 | 2016-2022 | |
| 27 | Brandon Leibrandt# | 1.70 | 2018-2025 |
