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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Héctor Aguilar# | 1.05 | 2026-2028 | |
| 1 | Stanley Eldrige# | 1.05 | 2025-2027 | |
| 3 | Reynaldo Sánchez# | 1.14 | 2020-2023 | |
| 4 | Pat Thompson | 1.17 | 2020-2022 | |
| 5 | Júlio Díaz# | 1.20 | 2032-2034 | |
| 5 | Nicolas Roche# | 1.20 | 2027-2030 | |
| 7 | Octávio Ríos# | 1.21 | 2020-2022 | |
| 8 | Lincoln Spooner# | 1.24 | 2026-2028 | |
| 8 | Will Hoffman# | 1.24 | 2026-2028 | |
| 10 | Edmund Blackadder# | 1.31 | 2026-2030 | |
| 10 | Gabriel Herrera# | 1.31 | 2022-2025 | |
| 12 | Barry Mullen# | 1.32 | 2028-2030 | |
| 13 | Bailey Achurch# | 1.33 | 2031-2034 | |
| 13 | Yoshihide Hirata# | 1.33 | 2030-2034 | |
| 15 | Garrett Schaper# | 1.34 | 2025-2030 | |
| 16 | Kelvin Fontijn# | 1.43 | 2030-2034 | |
| 17 | Enea Dini | 1.45 | 2020-2024 | |
| 18 | Curt Walker# | 1.53 | 2021-2023 |
