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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Tim McDonald# | 1.374 | 1960 | |
| 2 | Roger Craig# | 2.102 | 1961 | |
| 3 | Tim McDonald# | 2.250 | 1961 | |
| 4 | Mike Scharlau# | 2.360 | 1960 | |
| 5 | Jackie Richardson# | 2.551 | 1962 | |
| 6 | Steve Gilmore# | 2.882 | 1962 | |
| 7 | Chet Lee# | 3.109 | 1961 | |
| 8 | Single A Placeholder# | 3.246 | 1962 | |
| 9 | Single A Placeholder# | 3.278 | 1962 | |
| 10 | Single A Placeholder# | 3.615 | 1962 | |
| 11 | Single A Placeholder# | 3.748 | 1962 | |
| 12 | Single A Placeholder# | 3.775 | 1962 | |
| 13 | Single A Placeholder# | 3.951 | 1962 | |
| 14 | Single A Placeholder# | 3.972 | 1962 | |
| 15 | Single A Placeholder# | 3.984 | 1962 | |
| 16 | Rafael Velasquez# | 4.239 | 1962 | |
| 17 | Bob Hill# | 4.266 | 1962 | |
| 18 | Single A Placeholder# | 4.320 | 1962 | |
| 19 | Single A Placeholder# | 4.412 | 1962 | |
| 20 | Single A Placeholder# | 4.916 | 1962 | |
| 21 | Single A Placeholder# | 4.960 | 1962 | |
| 22 | Single A Placeholder# | 5.110 | 1962 |
