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| |
| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Jason Rutherford# | 0.73 | 2024 | |
| 2 | Ben Moore# | 0.80 | 2026 | |
| 3 | Tom Parker# | 0.87 | 2027 | |
| 4 | Willie de Leon# | 0.88 | 2027 | |
| 5 | Tim Lugo# | 0.89 | 2027 | |
| 6 | Stephen Wilkins# | 0.90 | 2026 | |
| 7 | Ricky Martinez# | 0.92 | 2027 | |
| 8 | Billy Corrigan# | 0.93 | 2027 | |
| 8 | Ricky Martinez# | 0.93 | 2025 | |
| 10 | Luis Salazar# | 0.94 | 2025 | |
| 11 | Dave Smith# | 0.95 | 2027 | |
| 12 | Edgar Villagomez# | 0.97 | 2027 | |
| 13 | Serge Garnier# | 1.00 | 2024 | |
| 14 | Rico Duran# | 1.02 | 2024 | |
| 14 | Fred Cornett# | 1.02 | 2025 | |
| 16 | Corey Gillis# | 1.05 | 2027 | |
| 17 | Ricky Acosta# | 1.07 | 2024 | |
| 18 | Rico Duran# | 1.11 | 2025 | |
| 18 | Ricky Acosta# | 1.11 | 2025 | |
| 18 | Bobby Juarez# | 1.11 | 2027 | |
| 21 | Joel Tangarife# | 1.12 | 2027 | |
| 21 | Willie Castro# | 1.12 | 2024 | |
| 23 | Tony Manriquez# | 1.13 | 2024 | |
| 24 | Daryl Rich# | 1.16 | 2027 | |
| 24 | Willie Castro# | 1.16 | 2025 | |
| 26 | Carlos Juarez# | 1.20 | 2025 | |
| 27 | Dave Smith# | 1.21 | 2026 | |
| 28 | Greg Olsen# | 1.22 | 2027 | |
| 29 | Luis Salazar# | 1.24 | 2024 | |
| 30 | Arturo Paredes# | 1.27 | 2024 | |
| 31 | Angel Lopez# | 1.29 | 2024 | |
| 32 | Mario Villalobos# | 1.31 | 2027 | |
| 32 | Carlos Juarez# | 1.31 | 2024 | |
| 34 | Nick Sorensen# | 1.32 | 2026 | |
| 35 | Jonathan Smith# | 1.33 | 2026 | |
| 35 | Corey Gillis# | 1.33 | 2025 | |
| 37 | Joel Tangarife# | 1.36 | 2025 | |
| 38 | Willis Novoa# | 1.38 | 2024 | |
| 39 | Harry Landers# | 1.42 | 2027 | |
| 40 | Phil Racine# | 1.45 | 2026 | |
| 41 | Mitch Burgess# | 1.46 | 2026 | |
| 42 | Leo Marquez# | 1.52 | 2027 | |
| 43 | Brandon Cobb# | 1.57 | 2025 | |
| 44 | Jadon Lynch# | 1.58 | 2026 | |
| 45 | Jason Rutherford# | 1.63 | 2025 | |
| 46 | Arturo Paredes# | 1.67 | 2025 | |
| 47 | Alex Sandoval# | 1.68 | 2027 | |
| 48 | Devin Ballard# | 1.72 | 2026 | |
| 48 | Jose Chavez# | 1.72 | 2024 | |
| 50 | Mark Ryan# | 1.73 | 2024 | |
| 51 | Bill Kowalchuk# | 2.02 | 2024 |
