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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Date | Player | Triple Crowns | |
|---|---|---|---|
| 1904 | Rafael García | 37-6, 1.26 ERA, 394.0 IP, 58 BB and 339 K | |
| 1905 | Ezequiel Vásquez | 39-8, 1.22 ERA, 384.2 IP, 96 BB and 477 K | |
| 1905 | Rafael García | 35-8, 1.55 ERA, 388.1 IP, 92 BB and 376 K | |
| 1910 | Everton Stack | 36-2, 0.69 ERA, 364.0 IP, 54 BB and 574 K | |
| 1913 | Rafael García | 28-8, 1.25 ERA, 330.1 IP, 118 BB and 376 K |
