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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Ryutaro Kanno# | 0.600 | 2150 | |
| 2 | Marvin Hill# | 0.818 | 2150 | |
| 3 | Hermenegildo Perry# | 1.723 | 2150 | |
| 4 | Baio Ming# | 2.045 | 2150 | |
| 5 | Germain Pozziano# | 2.250 | 2150 | |
| 6 | Mario López# | 2.348 | 2150 | |
| 7 | Gabriel Juárez# | 2.571 | 2150 | |
| 8 | Kazuyoshi Daikawa# | 2.700 | 2150 | |
| 9 | Yee Song# | 2.842 | 2150 | |
| 10 | Dan Weaver# | 4.800 | 2150 |
