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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Ricardo Martinez# | 0.458 | 2026 | |
| 2 | Javier Alba# | 0.491 | 2026 | |
| 3 | Angelo Quezada# | 0.810 | 2026 | |
| 4 | David Tirado# | 1.311 | 2026 | |
| 5 | Omar Sotelo# | 1.714 | 2026 | |
| 6 | John Mills# | 1.770 | 2026 | |
| 7 | Keith Carter# | 1.895 | 2026 | |
| 8 | Marty Capone# | 2.250 | 2026 | |
| 9 | Carlos Loera# | 2.418 | 2026 | |
| 10 | Jae-weong Hyun# | 2.547 | 2026 | |
| 11 | Nolan Estes# | 3.712 | 2026 | |
| 12 | Brian Treadway# | 3.938 | 2026 | |
| 13 | Juan Rosales# | 4.790 | 2026 |
