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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Marty Capone# | 0.62 | 2026 | |
| 2 | Angelo Quezada# | 0.81 | 2026 | |
| 2 | Ricardo Martinez# | 0.81 | 2026 | |
| 4 | Juan Rosales# | 0.87 | 2026 | |
| 4 | Javier Alba# | 0.87 | 2026 | |
| 6 | David Tirado# | 0.93 | 2026 | |
| 7 | Omar Sotelo# | 1.05 | 2026 | |
| 8 | Carlos Loera# | 1.07 | 2026 | |
| 9 | John Mills# | 1.08 | 2026 | |
| 10 | Jae-weong Hyun# | 1.13 | 2026 | |
| 11 | Keith Carter# | 1.16 | 2026 | |
| 12 | Nolan Estes# | 1.20 | 2026 | |
| 13 | Brian Treadway# | 1.31 | 2026 |
